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Finding the Fourth Proportional to 986.57, 1,479.51 and 337.15

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Solution

The fourth proportional to 986.57, 1,479.51 and 337.15 is: 505.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.57 : 1,479.51 = 337.15 : x
  2. Step 2: Convert to fraction form
    986.57/1,479.51 = 337.15/x
  3. Step 3: Cross multiply
    986.57x = 1,479.51 × 337.15
  4. Step 4: Simplify right side
    986.57x = 498,818.65
  5. Step 5: Solve for x
    x = 498,818.65/986.57
  6. Step 6: Final answer
    x = 505.61

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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.