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Finding the Fourth Proportional to 965.57, 1,449.17 and 619.57

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Solution

The fourth proportional to 965.57, 1,449.17 and 619.57 is: 929.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.57 : 1,449.17 = 619.57 : x
  2. Step 2: Convert to fraction form
    965.57/1,449.17 = 619.57/x
  3. Step 3: Cross multiply
    965.57x = 1,449.17 × 619.57
  4. Step 4: Simplify right side
    965.57x = 897,851.91
  5. Step 5: Solve for x
    x = 897,851.91/965.57
  6. Step 6: Final answer
    x = 929.87

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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.