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Finding the Fourth Proportional to 984.06, 1,358.40 and 591

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Solution

The fourth proportional to 984.06, 1,358.40 and 591 is: 815.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.06 : 1,358.40 = 591 : x
  2. Step 2: Convert to fraction form
    984.06/1,358.40 = 591/x
  3. Step 3: Cross multiply
    984.06x = 1,358.40 × 591
  4. Step 4: Simplify right side
    984.06x = 802,814.40
  5. Step 5: Solve for x
    x = 802,814.40/984.06
  6. Step 6: Final answer
    x = 815.82

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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.