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Finding the Fourth Proportional to 2,117.30, 3,176.49 and 818.42

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Solution

The fourth proportional to 2,117.30, 3,176.49 and 818.42 is: 1,227.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.30 : 3,176.49 = 818.42 : x
  2. Step 2: Convert to fraction form
    2,117.30/3,176.49 = 818.42/x
  3. Step 3: Cross multiply
    2,117.30x = 3,176.49 × 818.42
  4. Step 4: Simplify right side
    2,117.30x = 2,599,702.95
  5. Step 5: Solve for x
    x = 2,599,702.95/2,117.30
  6. Step 6: Final answer
    x = 1,227.84

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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.