Home / 3,108.30-4,660.84-916.74

Finding the Fourth Proportional to 3,108.30, 4,660.84 and 916.74

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Solution

The fourth proportional to 3,108.30, 4,660.84 and 916.74 is: 1,374.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.30 : 4,660.84 = 916.74 : x
  2. Step 2: Convert to fraction form
    3,108.30/4,660.84 = 916.74/x
  3. Step 3: Cross multiply
    3,108.30x = 4,660.84 × 916.74
  4. Step 4: Simplify right side
    3,108.30x = 4,272,773.88
  5. Step 5: Solve for x
    x = 4,272,773.88/3,108.30
  6. Step 6: Final answer
    x = 1,374.63

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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.