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Finding the Fourth Proportional to 984.67, 1,358.01 and 591.61

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Solution

The fourth proportional to 984.67, 1,358.01 and 591.61 is: 815.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.67 : 1,358.01 = 591.61 : x
  2. Step 2: Convert to fraction form
    984.67/1,358.01 = 591.61/x
  3. Step 3: Cross multiply
    984.67x = 1,358.01 × 591.61
  4. Step 4: Simplify right side
    984.67x = 803,418.50
  5. Step 5: Solve for x
    x = 803,418.50/984.67
  6. Step 6: Final answer
    x = 815.93

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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.