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Finding the Fourth Proportional to 784.97, 1,177.43 and 322.61

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Solution

The fourth proportional to 784.97, 1,177.43 and 322.61 is: 483.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.97 : 1,177.43 = 322.61 : x
  2. Step 2: Convert to fraction form
    784.97/1,177.43 = 322.61/x
  3. Step 3: Cross multiply
    784.97x = 1,177.43 × 322.61
  4. Step 4: Simplify right side
    784.97x = 379,850.69
  5. Step 5: Solve for x
    x = 379,850.69/784.97
  6. Step 6: Final answer
    x = 483.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.