Home / 312,742.12-431,769.06-205,499.88

Finding the Fourth Proportional to 312,742.12, 431,769.06 and 205,499.88

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Solution

The fourth proportional to 312,742.12, 431,769.06 and 205,499.88 is: 283,711.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,742.12 : 431,769.06 = 205,499.88 : x
  2. Step 2: Convert to fraction form
    312,742.12/431,769.06 = 205,499.88/x
  3. Step 3: Cross multiply
    312,742.12x = 431,769.06 × 205,499.88
  4. Step 4: Simplify right side
    312,742.12x = 88,728,490,017.71
  5. Step 5: Solve for x
    x = 88,728,490,017.71/312,742.12
  6. Step 6: Final answer
    x = 283,711.35

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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.