Home / 1,229.38-1,686.52-1,197.08

Finding the Fourth Proportional to 1,229.38, 1,686.52 and 1,197.08

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Solution

The fourth proportional to 1,229.38, 1,686.52 and 1,197.08 is: 1,642.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.38 : 1,686.52 = 1,197.08 : x
  2. Step 2: Convert to fraction form
    1,229.38/1,686.52 = 1,197.08/x
  3. Step 3: Cross multiply
    1,229.38x = 1,686.52 × 1,197.08
  4. Step 4: Simplify right side
    1,229.38x = 2,018,898.75
  5. Step 5: Solve for x
    x = 2,018,898.75/1,229.38
  6. Step 6: Final answer
    x = 1,642.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.