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Finding the Fourth Proportional to 717,673,888.96, 990,390,346.32 and 387,649,027.36

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Solution

The fourth proportional to 717,673,888.96, 990,390,346.32 and 387,649,027.36 is: 534,955,862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,673,888.96 : 990,390,346.32 = 387,649,027.36 : x
  2. Step 2: Convert to fraction form
    717,673,888.96/990,390,346.32 = 387,649,027.36/x
  3. Step 3: Cross multiply
    717,673,888.96x = 990,390,346.32 × 387,649,027.36
  4. Step 4: Simplify right side
    717,673,888.96x = 383,923,854,457,681,600
  5. Step 5: Solve for x
    x = 383,923,854,457,681,600/717,673,888.96
  6. Step 6: Final answer
    x = 534,955,862.77

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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.