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Finding the Fourth Proportional to 521,133,648.80, 781,700,473.20 and 265,798,839.20

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Solution

The fourth proportional to 521,133,648.80, 781,700,473.20 and 265,798,839.20 is: 398,698,258.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,133,648.80 : 781,700,473.20 = 265,798,839.20 : x
  2. Step 2: Convert to fraction form
    521,133,648.80/781,700,473.20 = 265,798,839.20/x
  3. Step 3: Cross multiply
    521,133,648.80x = 781,700,473.20 × 265,798,839.20
  4. Step 4: Simplify right side
    521,133,648.80x = 207,775,078,378,650,720
  5. Step 5: Solve for x
    x = 207,775,078,378,650,720/521,133,648.80
  6. Step 6: Final answer
    x = 398,698,258.80

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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.