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Finding the Fourth Proportional to 1,348.92, 1,860.96 and 851.55

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Solution

The fourth proportional to 1,348.92, 1,860.96 and 851.55 is: 1,174.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.92 : 1,860.96 = 851.55 : x
  2. Step 2: Convert to fraction form
    1,348.92/1,860.96 = 851.55/x
  3. Step 3: Cross multiply
    1,348.92x = 1,860.96 × 851.55
  4. Step 4: Simplify right side
    1,348.92x = 1,584,700.49
  5. Step 5: Solve for x
    x = 1,584,700.49/1,348.92
  6. Step 6: Final answer
    x = 1,174.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.