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Finding the Fourth Proportional to 749.06, 1,122.17 and 424.65

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Solution

The fourth proportional to 749.06, 1,122.17 and 424.65 is: 636.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.06 : 1,122.17 = 424.65 : x
  2. Step 2: Convert to fraction form
    749.06/1,122.17 = 424.65/x
  3. Step 3: Cross multiply
    749.06x = 1,122.17 × 424.65
  4. Step 4: Simplify right side
    749.06x = 476,527.37
  5. Step 5: Solve for x
    x = 476,527.37/749.06
  6. Step 6: Final answer
    x = 636.17

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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.