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Finding the Fourth Proportional to 408,894.60, 613,079.28 and 268,489.20

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Solution

The fourth proportional to 408,894.60, 613,079.28 and 268,489.20 is: 402,561.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,894.60 : 613,079.28 = 268,489.20 : x
  2. Step 2: Convert to fraction form
    408,894.60/613,079.28 = 268,489.20/x
  3. Step 3: Cross multiply
    408,894.60x = 613,079.28 × 268,489.20
  4. Step 4: Simplify right side
    408,894.60x = 164,605,165,423.78
  5. Step 5: Solve for x
    x = 164,605,165,423.78/408,894.60
  6. Step 6: Final answer
    x = 402,561.36

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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.