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Finding the Fourth Proportional to 1,678.53, 2,316.39 and 932.51

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Solution

The fourth proportional to 1,678.53, 2,316.39 and 932.51 is: 1,286.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.53 : 2,316.39 = 932.51 : x
  2. Step 2: Convert to fraction form
    1,678.53/2,316.39 = 932.51/x
  3. Step 3: Cross multiply
    1,678.53x = 2,316.39 × 932.51
  4. Step 4: Simplify right side
    1,678.53x = 2,160,045.26
  5. Step 5: Solve for x
    x = 2,160,045.26/1,678.53
  6. Step 6: Final answer
    x = 1,286.87

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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.