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Finding the Fourth Proportional to 1,035.73, 1,429.37 and 686.17

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Solution

The fourth proportional to 1,035.73, 1,429.37 and 686.17 is: 946.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.73 : 1,429.37 = 686.17 : x
  2. Step 2: Convert to fraction form
    1,035.73/1,429.37 = 686.17/x
  3. Step 3: Cross multiply
    1,035.73x = 1,429.37 × 686.17
  4. Step 4: Simplify right side
    1,035.73x = 980,790.81
  5. Step 5: Solve for x
    x = 980,790.81/1,035.73
  6. Step 6: Final answer
    x = 946.96

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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.