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Finding the Fourth Proportional to 992.39, 1,488.17 and 375.75

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Solution

The fourth proportional to 992.39, 1,488.17 and 375.75 is: 563.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.39 : 1,488.17 = 375.75 : x
  2. Step 2: Convert to fraction form
    992.39/1,488.17 = 375.75/x
  3. Step 3: Cross multiply
    992.39x = 1,488.17 × 375.75
  4. Step 4: Simplify right side
    992.39x = 559,178.00
  5. Step 5: Solve for x
    x = 559,178.00/992.39
  6. Step 6: Final answer
    x = 563.47

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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.