Home / 312,405.24-431,121.30-169,165.28

Finding the Fourth Proportional to 312,405.24, 431,121.30 and 169,165.28

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Solution

The fourth proportional to 312,405.24, 431,121.30 and 169,165.28 is: 233,449.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,405.24 : 431,121.30 = 169,165.28 : x
  2. Step 2: Convert to fraction form
    312,405.24/431,121.30 = 169,165.28/x
  3. Step 3: Cross multiply
    312,405.24x = 431,121.30 × 169,165.28
  4. Step 4: Simplify right side
    312,405.24x = 72,930,753,446.84
  5. Step 5: Solve for x
    x = 72,930,753,446.84/312,405.24
  6. Step 6: Final answer
    x = 233,449.20

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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.