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Finding the Fourth Proportional to 398,604,876.30, 597,907,314.45 and 381,386,187.90

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Solution

The fourth proportional to 398,604,876.30, 597,907,314.45 and 381,386,187.90 is: 572,079,281.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,604,876.30 : 597,907,314.45 = 381,386,187.90 : x
  2. Step 2: Convert to fraction form
    398,604,876.30/597,907,314.45 = 381,386,187.90/x
  3. Step 3: Cross multiply
    398,604,876.30x = 597,907,314.45 × 381,386,187.90
  4. Step 4: Simplify right side
    398,604,876.30x = 228,033,591,375,612,096
  5. Step 5: Solve for x
    x = 228,033,591,375,612,096/398,604,876.30
  6. Step 6: Final answer
    x = 572,079,281.85

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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.