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Finding the Fourth Proportional to 639,759,783.60, 898,246,500.30 and 639,759,783.60

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Solution

The fourth proportional to 639,759,783.60, 898,246,500.30 and 639,759,783.60 is: 898,246,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,759,783.60 : 898,246,500.30 = 639,759,783.60 : x
  2. Step 2: Convert to fraction form
    639,759,783.60/898,246,500.30 = 639,759,783.60/x
  3. Step 3: Cross multiply
    639,759,783.60x = 898,246,500.30 × 639,759,783.60
  4. Step 4: Simplify right side
    639,759,783.60x = 574,661,986,651,385,344
  5. Step 5: Solve for x
    x = 574,661,986,651,385,344/639,759,783.60
  6. Step 6: Final answer
    x = 898,246,500.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.