Home / 3,113.12-4,670.44-921.76

Finding the Fourth Proportional to 3,113.12, 4,670.44 and 921.76

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Solution

The fourth proportional to 3,113.12, 4,670.44 and 921.76 is: 1,382.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.12 : 4,670.44 = 921.76 : x
  2. Step 2: Convert to fraction form
    3,113.12/4,670.44 = 921.76/x
  3. Step 3: Cross multiply
    3,113.12x = 4,670.44 × 921.76
  4. Step 4: Simplify right side
    3,113.12x = 4,305,024.77
  5. Step 5: Solve for x
    x = 4,305,024.77/3,113.12
  6. Step 6: Final answer
    x = 1,382.87

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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.