Home / 278,139.20-418,083.60-272,890.40

Finding the Fourth Proportional to 278,139.20, 418,083.60 and 272,890.40

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Solution

The fourth proportional to 278,139.20, 418,083.60 and 272,890.40 is: 410,193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,139.20 : 418,083.60 = 272,890.40 : x
  2. Step 2: Convert to fraction form
    278,139.20/418,083.60 = 272,890.40/x
  3. Step 3: Cross multiply
    278,139.20x = 418,083.60 × 272,890.40
  4. Step 4: Simplify right side
    278,139.20x = 114,091,000,837.44
  5. Step 5: Solve for x
    x = 114,091,000,837.44/278,139.20
  6. Step 6: Final answer
    x = 410,193.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.