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Finding the Fourth Proportional to 3,177.86, 4,767.41 and 986.49

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Solution

The fourth proportional to 3,177.86, 4,767.41 and 986.49 is: 1,479.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,177.86 : 4,767.41 = 986.49 : x
  2. Step 2: Convert to fraction form
    3,177.86/4,767.41 = 986.49/x
  3. Step 3: Cross multiply
    3,177.86x = 4,767.41 × 986.49
  4. Step 4: Simplify right side
    3,177.86x = 4,703,004.76
  5. Step 5: Solve for x
    x = 4,703,004.76/3,177.86
  6. Step 6: Final answer
    x = 1,479.93

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1.5x scale

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.