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Finding the Fourth Proportional to 923.41, 1,382.97 and 459.75

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Solution

The fourth proportional to 923.41, 1,382.97 and 459.75 is: 688.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.41 : 1,382.97 = 459.75 : x
  2. Step 2: Convert to fraction form
    923.41/1,382.97 = 459.75/x
  3. Step 3: Cross multiply
    923.41x = 1,382.97 × 459.75
  4. Step 4: Simplify right side
    923.41x = 635,820.46
  5. Step 5: Solve for x
    x = 635,820.46/923.41
  6. Step 6: Final answer
    x = 688.56

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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.