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Finding the Fourth Proportional to 764.13, 1,145.52 and 373.91

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Solution

The fourth proportional to 764.13, 1,145.52 and 373.91 is: 560.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.13 : 1,145.52 = 373.91 : x
  2. Step 2: Convert to fraction form
    764.13/1,145.52 = 373.91/x
  3. Step 3: Cross multiply
    764.13x = 1,145.52 × 373.91
  4. Step 4: Simplify right side
    764.13x = 428,324.25
  5. Step 5: Solve for x
    x = 428,324.25/764.13
  6. Step 6: Final answer
    x = 560.54

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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.