Home / 3,113.40-4,670.55-921.84

Finding the Fourth Proportional to 3,113.40, 4,670.55 and 921.84

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Solution

The fourth proportional to 3,113.40, 4,670.55 and 921.84 is: 1,382.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.40 : 4,670.55 = 921.84 : x
  2. Step 2: Convert to fraction form
    3,113.40/4,670.55 = 921.84/x
  3. Step 3: Cross multiply
    3,113.40x = 4,670.55 × 921.84
  4. Step 4: Simplify right side
    3,113.40x = 4,305,471.85
  5. Step 5: Solve for x
    x = 4,305,471.85/3,113.40
  6. Step 6: Final answer
    x = 1,382.89

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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.