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Finding the Fourth Proportional to 748.19, 1,032.47 and 416.65

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Solution

The fourth proportional to 748.19, 1,032.47 and 416.65 is: 574.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.19 : 1,032.47 = 416.65 : x
  2. Step 2: Convert to fraction form
    748.19/1,032.47 = 416.65/x
  3. Step 3: Cross multiply
    748.19x = 1,032.47 × 416.65
  4. Step 4: Simplify right side
    748.19x = 430,171.38
  5. Step 5: Solve for x
    x = 430,171.38/748.19
  6. Step 6: Final answer
    x = 574.95

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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.