Home / 318,712.13-440,217.69-231,357.81

Finding the Fourth Proportional to 318,712.13, 440,217.69 and 231,357.81

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Solution

The fourth proportional to 318,712.13, 440,217.69 and 231,357.81 is: 319,560.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,712.13 : 440,217.69 = 231,357.81 : x
  2. Step 2: Convert to fraction form
    318,712.13/440,217.69 = 231,357.81/x
  3. Step 3: Cross multiply
    318,712.13x = 440,217.69 × 231,357.81
  4. Step 4: Simplify right side
    318,712.13x = 101,847,800,681.66
  5. Step 5: Solve for x
    x = 101,847,800,681.66/318,712.13
  6. Step 6: Final answer
    x = 319,560.48

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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.