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Finding the Fourth Proportional to 3,177.98, 4,767.10 and 986.72

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Solution

The fourth proportional to 3,177.98, 4,767.10 and 986.72 is: 1,480.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,177.98 : 4,767.10 = 986.72 : x
  2. Step 2: Convert to fraction form
    3,177.98/4,767.10 = 986.72/x
  3. Step 3: Cross multiply
    3,177.98x = 4,767.10 × 986.72
  4. Step 4: Simplify right side
    3,177.98x = 4,703,792.91
  5. Step 5: Solve for x
    x = 4,703,792.91/3,177.98
  6. Step 6: Final answer
    x = 1,480.12

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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.