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Finding the Fourth Proportional to 638,669,951.36, 881,197,978.80 and 374,209,852.40

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Solution

The fourth proportional to 638,669,951.36, 881,197,978.80 and 374,209,852.40 is: 516,312,008.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,669,951.36 : 881,197,978.80 = 374,209,852.40 : x
  2. Step 2: Convert to fraction form
    638,669,951.36/881,197,978.80 = 374,209,852.40/x
  3. Step 3: Cross multiply
    638,669,951.36x = 881,197,978.80 × 374,209,852.40
  4. Step 4: Simplify right side
    638,669,951.36x = 329,752,965,581,926,272
  5. Step 5: Solve for x
    x = 329,752,965,581,926,272/638,669,951.36
  6. Step 6: Final answer
    x = 516,312,008.85

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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.