Home / 281,971.28-389,128.92-154,655.48

Finding the Fourth Proportional to 281,971.28, 389,128.92 and 154,655.48

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Solution

The fourth proportional to 281,971.28, 389,128.92 and 154,655.48 is: 213,429.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,971.28 : 389,128.92 = 154,655.48 : x
  2. Step 2: Convert to fraction form
    281,971.28/389,128.92 = 154,655.48/x
  3. Step 3: Cross multiply
    281,971.28x = 389,128.92 × 154,655.48
  4. Step 4: Simplify right side
    281,971.28x = 60,180,919,904.48
  5. Step 5: Solve for x
    x = 60,180,919,904.48/281,971.28
  6. Step 6: Final answer
    x = 213,429.25

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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.