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Finding the Fourth Proportional to 908,107,133.92, 1,253,187,796.86 and 490,419,379

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Solution

The fourth proportional to 908,107,133.92, 1,253,187,796.86 and 490,419,379 is: 676,778,717.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,107,133.92 : 1,253,187,796.86 = 490,419,379 : x
  2. Step 2: Convert to fraction form
    908,107,133.92/1,253,187,796.86 = 490,419,379/x
  3. Step 3: Cross multiply
    908,107,133.92x = 1,253,187,796.86 × 490,419,379
  4. Step 4: Simplify right side
    908,107,133.92x = 614,587,581,106,459,264
  5. Step 5: Solve for x
    x = 614,587,581,106,459,264/908,107,133.92
  6. Step 6: Final answer
    x = 676,778,717.13

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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.