Home / 278,749.80-384,655.20-154,569.66

Finding the Fourth Proportional to 278,749.80, 384,655.20 and 154,569.66

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Solution

The fourth proportional to 278,749.80, 384,655.20 and 154,569.66 is: 213,295.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,749.80 : 384,655.20 = 154,569.66 : x
  2. Step 2: Convert to fraction form
    278,749.80/384,655.20 = 154,569.66/x
  3. Step 3: Cross multiply
    278,749.80x = 384,655.20 × 154,569.66
  4. Step 4: Simplify right side
    278,749.80x = 59,456,023,481.23
  5. Step 5: Solve for x
    x = 59,456,023,481.23/278,749.80
  6. Step 6: Final answer
    x = 213,295.30

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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.