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Finding the Fourth Proportional to 921.54, 1,382.17 and 373.59

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Solution

The fourth proportional to 921.54, 1,382.17 and 373.59 is: 560.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.54 : 1,382.17 = 373.59 : x
  2. Step 2: Convert to fraction form
    921.54/1,382.17 = 373.59/x
  3. Step 3: Cross multiply
    921.54x = 1,382.17 × 373.59
  4. Step 4: Simplify right side
    921.54x = 516,364.89
  5. Step 5: Solve for x
    x = 516,364.89/921.54
  6. Step 6: Final answer
    x = 560.33

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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.