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Finding the Fourth Proportional to 990.49, 1,366.87 and 592.33

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Solution

The fourth proportional to 990.49, 1,366.87 and 592.33 is: 817.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.49 : 1,366.87 = 592.33 : x
  2. Step 2: Convert to fraction form
    990.49/1,366.87 = 592.33/x
  3. Step 3: Cross multiply
    990.49x = 1,366.87 × 592.33
  4. Step 4: Simplify right side
    990.49x = 809,638.11
  5. Step 5: Solve for x
    x = 809,638.11/990.49
  6. Step 6: Final answer
    x = 817.41

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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.