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Finding the Fourth Proportional to 727.38, 1,086.35 and 630.18

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Solution

The fourth proportional to 727.38, 1,086.35 and 630.18 is: 941.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.38 : 1,086.35 = 630.18 : x
  2. Step 2: Convert to fraction form
    727.38/1,086.35 = 630.18/x
  3. Step 3: Cross multiply
    727.38x = 1,086.35 × 630.18
  4. Step 4: Simplify right side
    727.38x = 684,592.89
  5. Step 5: Solve for x
    x = 684,592.89/727.38
  6. Step 6: Final answer
    x = 941.18

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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.