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Finding the Fourth Proportional to 1,088.73, 1,502.63 and 646.87

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Solution

The fourth proportional to 1,088.73, 1,502.63 and 646.87 is: 892.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.73 : 1,502.63 = 646.87 : x
  2. Step 2: Convert to fraction form
    1,088.73/1,502.63 = 646.87/x
  3. Step 3: Cross multiply
    1,088.73x = 1,502.63 × 646.87
  4. Step 4: Simplify right side
    1,088.73x = 972,006.27
  5. Step 5: Solve for x
    x = 972,006.27/1,088.73
  6. Step 6: Final answer
    x = 892.79

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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.