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Finding the Fourth Proportional to 551,337,019.20, 827,005,528.80 and 426,501,528.30

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Solution

The fourth proportional to 551,337,019.20, 827,005,528.80 and 426,501,528.30 is: 639,752,292.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,337,019.20 : 827,005,528.80 = 426,501,528.30 : x
  2. Step 2: Convert to fraction form
    551,337,019.20/827,005,528.80 = 426,501,528.30/x
  3. Step 3: Cross multiply
    551,337,019.20x = 827,005,528.80 × 426,501,528.30
  4. Step 4: Simplify right side
    551,337,019.20x = 352,719,121,945,749,632
  5. Step 5: Solve for x
    x = 352,719,121,945,749,632/551,337,019.20
  6. Step 6: Final answer
    x = 639,752,292.45

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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.