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Finding the Fourth Proportional to 1,531.82, 2,113.17 and 942.14

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Solution

The fourth proportional to 1,531.82, 2,113.17 and 942.14 is: 1,299.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.82 : 2,113.17 = 942.14 : x
  2. Step 2: Convert to fraction form
    1,531.82/2,113.17 = 942.14/x
  3. Step 3: Cross multiply
    1,531.82x = 2,113.17 × 942.14
  4. Step 4: Simplify right side
    1,531.82x = 1,990,901.98
  5. Step 5: Solve for x
    x = 1,990,901.98/1,531.82
  6. Step 6: Final answer
    x = 1,299.70

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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.