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Finding the Fourth Proportional to 431,244.80, 646,867.20 and 411,891.20

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Solution

The fourth proportional to 431,244.80, 646,867.20 and 411,891.20 is: 617,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,244.80 : 646,867.20 = 411,891.20 : x
  2. Step 2: Convert to fraction form
    431,244.80/646,867.20 = 411,891.20/x
  3. Step 3: Cross multiply
    431,244.80x = 646,867.20 × 411,891.20
  4. Step 4: Simplify right side
    431,244.80x = 266,438,907,248.64
  5. Step 5: Solve for x
    x = 266,438,907,248.64/431,244.80
  6. Step 6: Final answer
    x = 617,836.80

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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.