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Finding the Fourth Proportional to 1,071.92, 1,479.80 and 658.16

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Solution

The fourth proportional to 1,071.92, 1,479.80 and 658.16 is: 908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.92 : 1,479.80 = 658.16 : x
  2. Step 2: Convert to fraction form
    1,071.92/1,479.80 = 658.16/x
  3. Step 3: Cross multiply
    1,071.92x = 1,479.80 × 658.16
  4. Step 4: Simplify right side
    1,071.92x = 973,945.17
  5. Step 5: Solve for x
    x = 973,945.17/1,071.92
  6. Step 6: Final answer
    x = 908.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.