Home / 223,139.38-307,578.45-218,715.70

Finding the Fourth Proportional to 223,139.38, 307,578.45 and 218,715.70

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Solution

The fourth proportional to 223,139.38, 307,578.45 and 218,715.70 is: 301,480.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,139.38 : 307,578.45 = 218,715.70 : x
  2. Step 2: Convert to fraction form
    223,139.38/307,578.45 = 218,715.70/x
  3. Step 3: Cross multiply
    223,139.38x = 307,578.45 × 218,715.70
  4. Step 4: Simplify right side
    223,139.38x = 67,272,235,996.67
  5. Step 5: Solve for x
    x = 67,272,235,996.67/223,139.38
  6. Step 6: Final answer
    x = 301,480.79

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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.