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Finding the Fourth Proportional to 3,108.57, 4,661.46 and 916.53

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Solution

The fourth proportional to 3,108.57, 4,661.46 and 916.53 is: 1,374.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.57 : 4,661.46 = 916.53 : x
  2. Step 2: Convert to fraction form
    3,108.57/4,661.46 = 916.53/x
  3. Step 3: Cross multiply
    3,108.57x = 4,661.46 × 916.53
  4. Step 4: Simplify right side
    3,108.57x = 4,272,367.93
  5. Step 5: Solve for x
    x = 4,272,367.93/3,108.57
  6. Step 6: Final answer
    x = 1,374.38

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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.