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Finding the Fourth Proportional to 990.38, 1,366.71 and 597.62

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Solution

The fourth proportional to 990.38, 1,366.71 and 597.62 is: 824.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.38 : 1,366.71 = 597.62 : x
  2. Step 2: Convert to fraction form
    990.38/1,366.71 = 597.62/x
  3. Step 3: Cross multiply
    990.38x = 1,366.71 × 597.62
  4. Step 4: Simplify right side
    990.38x = 816,773.23
  5. Step 5: Solve for x
    x = 816,773.23/990.38
  6. Step 6: Final answer
    x = 824.71

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1.5x scale

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.