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Finding the Fourth Proportional to 990.51, 1,366.92 and 592.26

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Solution

The fourth proportional to 990.51, 1,366.92 and 592.26 is: 817.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.51 : 1,366.92 = 592.26 : x
  2. Step 2: Convert to fraction form
    990.51/1,366.92 = 592.26/x
  3. Step 3: Cross multiply
    990.51x = 1,366.92 × 592.26
  4. Step 4: Simplify right side
    990.51x = 809,572.04
  5. Step 5: Solve for x
    x = 809,572.04/990.51
  6. Step 6: Final answer
    x = 817.33

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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.