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Finding the Fourth Proportional to 764.55, 1,145.61 and 591.64

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Solution

The fourth proportional to 764.55, 1,145.61 and 591.64 is: 886.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.55 : 1,145.61 = 591.64 : x
  2. Step 2: Convert to fraction form
    764.55/1,145.61 = 591.64/x
  3. Step 3: Cross multiply
    764.55x = 1,145.61 × 591.64
  4. Step 4: Simplify right side
    764.55x = 677,785.84
  5. Step 5: Solve for x
    x = 677,785.84/764.55
  6. Step 6: Final answer
    x = 886.52

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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.