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Finding the Fourth Proportional to 992.69, 1,487.96 and 376.12

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Solution

The fourth proportional to 992.69, 1,487.96 and 376.12 is: 563.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.69 : 1,487.96 = 376.12 : x
  2. Step 2: Convert to fraction form
    992.69/1,487.96 = 376.12/x
  3. Step 3: Cross multiply
    992.69x = 1,487.96 × 376.12
  4. Step 4: Simplify right side
    992.69x = 559,648.19
  5. Step 5: Solve for x
    x = 559,648.19/992.69
  6. Step 6: Final answer
    x = 563.77

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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.