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Finding the Fourth Proportional to 731.26, 1,008.57 and 436.47

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Solution

The fourth proportional to 731.26, 1,008.57 and 436.47 is: 601.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.26 : 1,008.57 = 436.47 : x
  2. Step 2: Convert to fraction form
    731.26/1,008.57 = 436.47/x
  3. Step 3: Cross multiply
    731.26x = 1,008.57 × 436.47
  4. Step 4: Simplify right side
    731.26x = 440,210.55
  5. Step 5: Solve for x
    x = 440,210.55/731.26
  6. Step 6: Final answer
    x = 601.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.