Home / 3,119.72-4,678.76-927.86

Finding the Fourth Proportional to 3,119.72, 4,678.76 and 927.86

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Solution

The fourth proportional to 3,119.72, 4,678.76 and 927.86 is: 1,391.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.72 : 4,678.76 = 927.86 : x
  2. Step 2: Convert to fraction form
    3,119.72/4,678.76 = 927.86/x
  3. Step 3: Cross multiply
    3,119.72x = 4,678.76 × 927.86
  4. Step 4: Simplify right side
    3,119.72x = 4,341,234.25
  5. Step 5: Solve for x
    x = 4,341,234.25/3,119.72
  6. Step 6: Final answer
    x = 1,391.55

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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.