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Finding the Fourth Proportional to 1,089.29, 1,503.23 and 591.91

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Solution

The fourth proportional to 1,089.29, 1,503.23 and 591.91 is: 816.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.29 : 1,503.23 = 591.91 : x
  2. Step 2: Convert to fraction form
    1,089.29/1,503.23 = 591.91/x
  3. Step 3: Cross multiply
    1,089.29x = 1,503.23 × 591.91
  4. Step 4: Simplify right side
    1,089.29x = 889,770.15
  5. Step 5: Solve for x
    x = 889,770.15/1,089.29
  6. Step 6: Final answer
    x = 816.83

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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.