Home / 918,756,305.74-1,378,132,356.05-393,785,008.61

Finding the Fourth Proportional to 918,756,305.74, 1,378,132,356.05 and 393,785,008.61

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Solution

The fourth proportional to 918,756,305.74, 1,378,132,356.05 and 393,785,008.61 is: 590,676,611.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,756,305.74 : 1,378,132,356.05 = 393,785,008.61 : x
  2. Step 2: Convert to fraction form
    918,756,305.74/1,378,132,356.05 = 393,785,008.61/x
  3. Step 3: Cross multiply
    918,756,305.74x = 1,378,132,356.05 × 393,785,008.61
  4. Step 4: Simplify right side
    918,756,305.74x = 542,687,861,690,899,968
  5. Step 5: Solve for x
    x = 542,687,861,690,899,968/918,756,305.74
  6. Step 6: Final answer
    x = 590,676,611.74

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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.