Home / 3,108.10-4,661.70-916.72

Finding the Fourth Proportional to 3,108.10, 4,661.70 and 916.72

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Solution

The fourth proportional to 3,108.10, 4,661.70 and 916.72 is: 1,374.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.10 : 4,661.70 = 916.72 : x
  2. Step 2: Convert to fraction form
    3,108.10/4,661.70 = 916.72/x
  3. Step 3: Cross multiply
    3,108.10x = 4,661.70 × 916.72
  4. Step 4: Simplify right side
    3,108.10x = 4,273,473.62
  5. Step 5: Solve for x
    x = 4,273,473.62/3,108.10
  6. Step 6: Final answer
    x = 1,374.95

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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.