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Finding the Fourth Proportional to 727.47, 1,086.57 and 630.27

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Solution

The fourth proportional to 727.47, 1,086.57 and 630.27 is: 941.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.47 : 1,086.57 = 630.27 : x
  2. Step 2: Convert to fraction form
    727.47/1,086.57 = 630.27/x
  3. Step 3: Cross multiply
    727.47x = 1,086.57 × 630.27
  4. Step 4: Simplify right side
    727.47x = 684,836.55
  5. Step 5: Solve for x
    x = 684,836.55/727.47
  6. Step 6: Final answer
    x = 941.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.