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Finding the Fourth Proportional to 765.83, 1,148.89 and 327.08

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Solution

The fourth proportional to 765.83, 1,148.89 and 327.08 is: 490.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.83 : 1,148.89 = 327.08 : x
  2. Step 2: Convert to fraction form
    765.83/1,148.89 = 327.08/x
  3. Step 3: Cross multiply
    765.83x = 1,148.89 × 327.08
  4. Step 4: Simplify right side
    765.83x = 375,779.30
  5. Step 5: Solve for x
    x = 375,779.30/765.83
  6. Step 6: Final answer
    x = 490.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.