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Finding the Fourth Proportional to 984.12, 1,358.12 and 652.65

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Solution

The fourth proportional to 984.12, 1,358.12 and 652.65 is: 900.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.12 : 1,358.12 = 652.65 : x
  2. Step 2: Convert to fraction form
    984.12/1,358.12 = 652.65/x
  3. Step 3: Cross multiply
    984.12x = 1,358.12 × 652.65
  4. Step 4: Simplify right side
    984.12x = 886,378.65
  5. Step 5: Solve for x
    x = 886,378.65/984.12
  6. Step 6: Final answer
    x = 900.68

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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.