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Finding the Fourth Proportional to 992.85, 1,370.18 and 599.90

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Solution

The fourth proportional to 992.85, 1,370.18 and 599.90 is: 827.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.85 : 1,370.18 = 599.90 : x
  2. Step 2: Convert to fraction form
    992.85/1,370.18 = 599.90/x
  3. Step 3: Cross multiply
    992.85x = 1,370.18 × 599.90
  4. Step 4: Simplify right side
    992.85x = 821,961.13
  5. Step 5: Solve for x
    x = 821,961.13/992.85
  6. Step 6: Final answer
    x = 827.88

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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.