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Finding the Fourth Proportional to 577,378.20, 865,419.30 and 278,002.20

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Solution

The fourth proportional to 577,378.20, 865,419.30 and 278,002.20 is: 416,691.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,378.20 : 865,419.30 = 278,002.20 : x
  2. Step 2: Convert to fraction form
    577,378.20/865,419.30 = 278,002.20/x
  3. Step 3: Cross multiply
    577,378.20x = 865,419.30 × 278,002.20
  4. Step 4: Simplify right side
    577,378.20x = 240,588,469,322.46
  5. Step 5: Solve for x
    x = 240,588,469,322.46/577,378.20
  6. Step 6: Final answer
    x = 416,691.29

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1.5x scale

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.