Home / 318,129.17-438,871.91-281,867.72

Finding the Fourth Proportional to 318,129.17, 438,871.91 and 281,867.72

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Solution

The fourth proportional to 318,129.17, 438,871.91 and 281,867.72 is: 388,847.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,129.17 : 438,871.91 = 281,867.72 : x
  2. Step 2: Convert to fraction form
    318,129.17/438,871.91 = 281,867.72/x
  3. Step 3: Cross multiply
    318,129.17x = 438,871.91 × 281,867.72
  4. Step 4: Simplify right side
    318,129.17x = 123,703,821,040.05
  5. Step 5: Solve for x
    x = 123,703,821,040.05/318,129.17
  6. Step 6: Final answer
    x = 388,847.78

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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.