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Finding the Fourth Proportional to 663,218,372.40, 994,818,227.40 and 299,712,145.20

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Solution

The fourth proportional to 663,218,372.40, 994,818,227.40 and 299,712,145.20 is: 449,564,000.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,218,372.40 : 994,818,227.40 = 299,712,145.20 : x
  2. Step 2: Convert to fraction form
    663,218,372.40/994,818,227.40 = 299,712,145.20/x
  3. Step 3: Cross multiply
    663,218,372.40x = 994,818,227.40 × 299,712,145.20
  4. Step 4: Simplify right side
    663,218,372.40x = 298,159,105,018,115,392
  5. Step 5: Solve for x
    x = 298,159,105,018,115,392/663,218,372.40
  6. Step 6: Final answer
    x = 449,564,000.98

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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.