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Finding the Fourth Proportional to 1,062.30, 1,466.02 and 642.57

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Solution

The fourth proportional to 1,062.30, 1,466.02 and 642.57 is: 886.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.30 : 1,466.02 = 642.57 : x
  2. Step 2: Convert to fraction form
    1,062.30/1,466.02 = 642.57/x
  3. Step 3: Cross multiply
    1,062.30x = 1,466.02 × 642.57
  4. Step 4: Simplify right side
    1,062.30x = 942,024.53
  5. Step 5: Solve for x
    x = 942,024.53/1,062.30
  6. Step 6: Final answer
    x = 886.78

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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.