Home / 391,869.12-540,790.56-238,916.16

Finding the Fourth Proportional to 391,869.12, 540,790.56 and 238,916.16

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Solution

The fourth proportional to 391,869.12, 540,790.56 and 238,916.16 is: 329,711.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,869.12 : 540,790.56 = 238,916.16 : x
  2. Step 2: Convert to fraction form
    391,869.12/540,790.56 = 238,916.16/x
  3. Step 3: Cross multiply
    391,869.12x = 540,790.56 × 238,916.16
  4. Step 4: Simplify right side
    391,869.12x = 129,203,603,959.45
  5. Step 5: Solve for x
    x = 129,203,603,959.45/391,869.12
  6. Step 6: Final answer
    x = 329,711.11

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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.