Home / 427,138.47-641,023.12-202,499.69

Finding the Fourth Proportional to 427,138.47, 641,023.12 and 202,499.69

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Solution

The fourth proportional to 427,138.47, 641,023.12 and 202,499.69 is: 303,899.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,138.47 : 641,023.12 = 202,499.69 : x
  2. Step 2: Convert to fraction form
    427,138.47/641,023.12 = 202,499.69/x
  3. Step 3: Cross multiply
    427,138.47x = 641,023.12 × 202,499.69
  4. Step 4: Simplify right side
    427,138.47x = 129,806,983,082.83
  5. Step 5: Solve for x
    x = 129,806,983,082.83/427,138.47
  6. Step 6: Final answer
    x = 303,899.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.