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Finding the Fourth Proportional to 992.52, 1,486.92 and 626.76

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Solution

The fourth proportional to 992.52, 1,486.92 and 626.76 is: 938.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.52 : 1,486.92 = 626.76 : x
  2. Step 2: Convert to fraction form
    992.52/1,486.92 = 626.76/x
  3. Step 3: Cross multiply
    992.52x = 1,486.92 × 626.76
  4. Step 4: Simplify right side
    992.52x = 931,941.98
  5. Step 5: Solve for x
    x = 931,941.98/992.52
  6. Step 6: Final answer
    x = 938.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.