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Finding the Fourth Proportional to 717,673,884.96, 990,390,340.80 and 387,649,023.36

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Solution

The fourth proportional to 717,673,884.96, 990,390,340.80 and 387,649,023.36 is: 534,955,857.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,673,884.96 : 990,390,340.80 = 387,649,023.36 : x
  2. Step 2: Convert to fraction form
    717,673,884.96/990,390,340.80 = 387,649,023.36/x
  3. Step 3: Cross multiply
    717,673,884.96x = 990,390,340.80 × 387,649,023.36
  4. Step 4: Simplify right side
    717,673,884.96x = 383,923,848,356,297,536
  5. Step 5: Solve for x
    x = 383,923,848,356,297,536/717,673,884.96
  6. Step 6: Final answer
    x = 534,955,857.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.