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Finding the Fourth Proportional to 1,089.11, 1,502.98 and 591.76

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Solution

The fourth proportional to 1,089.11, 1,502.98 and 591.76 is: 816.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.11 : 1,502.98 = 591.76 : x
  2. Step 2: Convert to fraction form
    1,089.11/1,502.98 = 591.76/x
  3. Step 3: Cross multiply
    1,089.11x = 1,502.98 × 591.76
  4. Step 4: Simplify right side
    1,089.11x = 889,401.17
  5. Step 5: Solve for x
    x = 889,401.17/1,089.11
  6. Step 6: Final answer
    x = 816.63

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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.