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Finding the Fourth Proportional to 1,089.14, 1,502.98 and 591.76

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Solution

The fourth proportional to 1,089.14, 1,502.98 and 591.76 is: 816.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.14 : 1,502.98 = 591.76 : x
  2. Step 2: Convert to fraction form
    1,089.14/1,502.98 = 591.76/x
  3. Step 3: Cross multiply
    1,089.14x = 1,502.98 × 591.76
  4. Step 4: Simplify right side
    1,089.14x = 889,403.44
  5. Step 5: Solve for x
    x = 889,403.44/1,089.14
  6. Step 6: Final answer
    x = 816.61

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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.