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Finding the Fourth Proportional to 647,712.10, 971,568.15 and 622,828.90

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Solution

The fourth proportional to 647,712.10, 971,568.15 and 622,828.90 is: 934,243.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,712.10 : 971,568.15 = 622,828.90 : x
  2. Step 2: Convert to fraction form
    647,712.10/971,568.15 = 622,828.90/x
  3. Step 3: Cross multiply
    647,712.10x = 971,568.15 × 622,828.90
  4. Step 4: Simplify right side
    647,712.10x = 605,120,722,139.54
  5. Step 5: Solve for x
    x = 605,120,722,139.54/647,712.10
  6. Step 6: Final answer
    x = 934,243.35

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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.