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Finding the Fourth Proportional to 922.92, 1,377.72 and 785.04

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Solution

The fourth proportional to 922.92, 1,377.72 and 785.04 is: 1,171.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.92 : 1,377.72 = 785.04 : x
  2. Step 2: Convert to fraction form
    922.92/1,377.72 = 785.04/x
  3. Step 3: Cross multiply
    922.92x = 1,377.72 × 785.04
  4. Step 4: Simplify right side
    922.92x = 1,081,565.31
  5. Step 5: Solve for x
    x = 1,081,565.31/922.92
  6. Step 6: Final answer
    x = 1,171.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.