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Finding the Fourth Proportional to 960.57, 1,429.94 and 915.84

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Solution

The fourth proportional to 960.57, 1,429.94 and 915.84 is: 1,363.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.57 : 1,429.94 = 915.84 : x
  2. Step 2: Convert to fraction form
    960.57/1,429.94 = 915.84/x
  3. Step 3: Cross multiply
    960.57x = 1,429.94 × 915.84
  4. Step 4: Simplify right side
    960.57x = 1,309,591.67
  5. Step 5: Solve for x
    x = 1,309,591.67/960.57
  6. Step 6: Final answer
    x = 1,363.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.