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Finding the Fourth Proportional to 278,803,498.60, 418,205,247.90 and 248,670,793.90

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Solution

The fourth proportional to 278,803,498.60, 418,205,247.90 and 248,670,793.90 is: 373,006,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,803,498.60 : 418,205,247.90 = 248,670,793.90 : x
  2. Step 2: Convert to fraction form
    278,803,498.60/418,205,247.90 = 248,670,793.90/x
  3. Step 3: Cross multiply
    278,803,498.60x = 418,205,247.90 × 248,670,793.90
  4. Step 4: Simplify right side
    278,803,498.60x = 103,995,431,008,439,312
  5. Step 5: Solve for x
    x = 103,995,431,008,439,312/278,803,498.60
  6. Step 6: Final answer
    x = 373,006,190.85

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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.