Home / 1,253.42-1,865.38-1,211.90

Finding the Fourth Proportional to 1,253.42, 1,865.38 and 1,211.90

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Solution

The fourth proportional to 1,253.42, 1,865.38 and 1,211.90 is: 1,803.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.42 : 1,865.38 = 1,211.90 : x
  2. Step 2: Convert to fraction form
    1,253.42/1,865.38 = 1,211.90/x
  3. Step 3: Cross multiply
    1,253.42x = 1,865.38 × 1,211.90
  4. Step 4: Simplify right side
    1,253.42x = 2,260,654.02
  5. Step 5: Solve for x
    x = 2,260,654.02/1,253.42
  6. Step 6: Final answer
    x = 1,803.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.