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Finding the Fourth Proportional to 986.72, 1,479.96 and 337.40

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Solution

The fourth proportional to 986.72, 1,479.96 and 337.40 is: 506.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.72 : 1,479.96 = 337.40 : x
  2. Step 2: Convert to fraction form
    986.72/1,479.96 = 337.40/x
  3. Step 3: Cross multiply
    986.72x = 1,479.96 × 337.40
  4. Step 4: Simplify right side
    986.72x = 499,338.50
  5. Step 5: Solve for x
    x = 499,338.50/986.72
  6. Step 6: Final answer
    x = 506.06

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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.