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Finding the Fourth Proportional to 279,938,691.40, 419,908,037.10 and 254,856,425.80

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Solution

The fourth proportional to 279,938,691.40, 419,908,037.10 and 254,856,425.80 is: 382,284,638.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,691.40 : 419,908,037.10 = 254,856,425.80 : x
  2. Step 2: Convert to fraction form
    279,938,691.40/419,908,037.10 = 254,856,425.80/x
  3. Step 3: Cross multiply
    279,938,691.40x = 419,908,037.10 × 254,856,425.80
  4. Step 4: Simplify right side
    279,938,691.40x = 107,016,261,499,999,808
  5. Step 5: Solve for x
    x = 107,016,261,499,999,808/279,938,691.40
  6. Step 6: Final answer
    x = 382,284,638.70

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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.