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Finding the Fourth Proportional to 426,891.60, 639,646.20 and 268,837.20

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Solution

The fourth proportional to 426,891.60, 639,646.20 and 268,837.20 is: 402,820.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,891.60 : 639,646.20 = 268,837.20 : x
  2. Step 2: Convert to fraction form
    426,891.60/639,646.20 = 268,837.20/x
  3. Step 3: Cross multiply
    426,891.60x = 639,646.20 × 268,837.20
  4. Step 4: Simplify right side
    426,891.60x = 171,960,693,398.64
  5. Step 5: Solve for x
    x = 171,960,693,398.64/426,891.60
  6. Step 6: Final answer
    x = 402,820.51

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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.