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Finding the Fourth Proportional to 576,104.40, 862,990.20 and 398,811.60

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Solution

The fourth proportional to 576,104.40, 862,990.20 and 398,811.60 is: 597,409.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,104.40 : 862,990.20 = 398,811.60 : x
  2. Step 2: Convert to fraction form
    576,104.40/862,990.20 = 398,811.60/x
  3. Step 3: Cross multiply
    576,104.40x = 862,990.20 × 398,811.60
  4. Step 4: Simplify right side
    576,104.40x = 344,170,502,446.32
  5. Step 5: Solve for x
    x = 344,170,502,446.32/576,104.40
  6. Step 6: Final answer
    x = 597,409.95

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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.