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Finding the Fourth Proportional to 1,089.75, 1,503.89 and 592.43

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Solution

The fourth proportional to 1,089.75, 1,503.89 and 592.43 is: 817.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.75 : 1,503.89 = 592.43 : x
  2. Step 2: Convert to fraction form
    1,089.75/1,503.89 = 592.43/x
  3. Step 3: Cross multiply
    1,089.75x = 1,503.89 × 592.43
  4. Step 4: Simplify right side
    1,089.75x = 890,942.03
  5. Step 5: Solve for x
    x = 890,942.03/1,089.75
  6. Step 6: Final answer
    x = 817.57

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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.