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Finding the Fourth Proportional to 1,178.22, 1,625.47 and 824.05

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Solution

The fourth proportional to 1,178.22, 1,625.47 and 824.05 is: 1,136.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.22 : 1,625.47 = 824.05 : x
  2. Step 2: Convert to fraction form
    1,178.22/1,625.47 = 824.05/x
  3. Step 3: Cross multiply
    1,178.22x = 1,625.47 × 824.05
  4. Step 4: Simplify right side
    1,178.22x = 1,339,468.55
  5. Step 5: Solve for x
    x = 1,339,468.55/1,178.22
  6. Step 6: Final answer
    x = 1,136.86

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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.