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Finding the Fourth Proportional to 631.56, 942.18 and 614.55

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Solution

The fourth proportional to 631.56, 942.18 and 614.55 is: 916.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.56 : 942.18 = 614.55 : x
  2. Step 2: Convert to fraction form
    631.56/942.18 = 614.55/x
  3. Step 3: Cross multiply
    631.56x = 942.18 × 614.55
  4. Step 4: Simplify right side
    631.56x = 579,016.72
  5. Step 5: Solve for x
    x = 579,016.72/631.56
  6. Step 6: Final answer
    x = 916.80

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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.