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Finding the Fourth Proportional to 1,241.98, 1,860.80 and 851.52

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Solution

The fourth proportional to 1,241.98, 1,860.80 and 851.52 is: 1,275.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.98 : 1,860.80 = 851.52 : x
  2. Step 2: Convert to fraction form
    1,241.98/1,860.80 = 851.52/x
  3. Step 3: Cross multiply
    1,241.98x = 1,860.80 × 851.52
  4. Step 4: Simplify right side
    1,241.98x = 1,584,508.42
  5. Step 5: Solve for x
    x = 1,584,508.42/1,241.98
  6. Step 6: Final answer
    x = 1,275.79

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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.