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Finding the Fourth Proportional to 764.64, 1,146.20 and 610.83

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Solution

The fourth proportional to 764.64, 1,146.20 and 610.83 is: 915.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.64 : 1,146.20 = 610.83 : x
  2. Step 2: Convert to fraction form
    764.64/1,146.20 = 610.83/x
  3. Step 3: Cross multiply
    764.64x = 1,146.20 × 610.83
  4. Step 4: Simplify right side
    764.64x = 700,130.29
  5. Step 5: Solve for x
    x = 700,130.29/764.64
  6. Step 6: Final answer
    x = 915.63

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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.