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Finding the Fourth Proportional to 647,438,447.40, 971,157,671.10 and 579,413,999.40

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Solution

The fourth proportional to 647,438,447.40, 971,157,671.10 and 579,413,999.40 is: 869,120,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,438,447.40 : 971,157,671.10 = 579,413,999.40 : x
  2. Step 2: Convert to fraction form
    647,438,447.40/971,157,671.10 = 579,413,999.40/x
  3. Step 3: Cross multiply
    647,438,447.40x = 971,157,671.10 × 579,413,999.40
  4. Step 4: Simplify right side
    647,438,447.40x = 562,702,350,260,040,768
  5. Step 5: Solve for x
    x = 562,702,350,260,040,768/647,438,447.40
  6. Step 6: Final answer
    x = 869,120,999.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.