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Finding the Fourth Proportional to 942.31, 1,300.35 and 522.61

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Solution

The fourth proportional to 942.31, 1,300.35 and 522.61 is: 721.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.31 : 1,300.35 = 522.61 : x
  2. Step 2: Convert to fraction form
    942.31/1,300.35 = 522.61/x
  3. Step 3: Cross multiply
    942.31x = 1,300.35 × 522.61
  4. Step 4: Simplify right side
    942.31x = 679,575.91
  5. Step 5: Solve for x
    x = 679,575.91/942.31
  6. Step 6: Final answer
    x = 721.18

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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.