Home / 306,278.40-422,634.24-172,139.52

Finding the Fourth Proportional to 306,278.40, 422,634.24 and 172,139.52

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Solution

The fourth proportional to 306,278.40, 422,634.24 and 172,139.52 is: 237,535.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,278.40 : 422,634.24 = 172,139.52 : x
  2. Step 2: Convert to fraction form
    306,278.40/422,634.24 = 172,139.52/x
  3. Step 3: Cross multiply
    306,278.40x = 422,634.24 × 172,139.52
  4. Step 4: Simplify right side
    306,278.40x = 72,752,055,209.16
  5. Step 5: Solve for x
    x = 72,752,055,209.16/306,278.40
  6. Step 6: Final answer
    x = 237,535.70

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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.