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Finding the Fourth Proportional to 961.48, 1,440.06 and 929.08

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Solution

The fourth proportional to 961.48, 1,440.06 and 929.08 is: 1,391.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.48 : 1,440.06 = 929.08 : x
  2. Step 2: Convert to fraction form
    961.48/1,440.06 = 929.08/x
  3. Step 3: Cross multiply
    961.48x = 1,440.06 × 929.08
  4. Step 4: Simplify right side
    961.48x = 1,337,930.94
  5. Step 5: Solve for x
    x = 1,337,930.94/961.48
  6. Step 6: Final answer
    x = 1,391.53

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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.