Home / 318,711.09-440,216.27-231,356.78

Finding the Fourth Proportional to 318,711.09, 440,216.27 and 231,356.78

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Solution

The fourth proportional to 318,711.09, 440,216.27 and 231,356.78 is: 319,559.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,711.09 : 440,216.27 = 231,356.78 : x
  2. Step 2: Convert to fraction form
    318,711.09/440,216.27 = 231,356.78/x
  3. Step 3: Cross multiply
    318,711.09x = 440,216.27 × 231,356.78
  4. Step 4: Simplify right side
    318,711.09x = 101,847,016,002.55
  5. Step 5: Solve for x
    x = 101,847,016,002.55/318,711.09
  6. Step 6: Final answer
    x = 319,559.06

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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.