Home / 1,301.42-1,942.62-1,129.30

Finding the Fourth Proportional to 1,301.42, 1,942.62 and 1,129.30

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Solution

The fourth proportional to 1,301.42, 1,942.62 and 1,129.30 is: 1,685.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.42 : 1,942.62 = 1,129.30 : x
  2. Step 2: Convert to fraction form
    1,301.42/1,942.62 = 1,129.30/x
  3. Step 3: Cross multiply
    1,301.42x = 1,942.62 × 1,129.30
  4. Step 4: Simplify right side
    1,301.42x = 2,193,800.77
  5. Step 5: Solve for x
    x = 2,193,800.77/1,301.42
  6. Step 6: Final answer
    x = 1,685.70

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1.5x scale

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.