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Finding the Fourth Proportional to 576,490.80, 866,809.80 and 485,252.40

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Solution

The fourth proportional to 576,490.80, 866,809.80 and 485,252.40 is: 729,624.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,490.80 : 866,809.80 = 485,252.40 : x
  2. Step 2: Convert to fraction form
    576,490.80/866,809.80 = 485,252.40/x
  3. Step 3: Cross multiply
    576,490.80x = 866,809.80 × 485,252.40
  4. Step 4: Simplify right side
    576,490.80x = 420,621,535,793.52
  5. Step 5: Solve for x
    x = 420,621,535,793.52/576,490.80
  6. Step 6: Final answer
    x = 729,624.02

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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.