Home / 278,997.82-385,020.23-154,821.35

Finding the Fourth Proportional to 278,997.82, 385,020.23 and 154,821.35

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Solution

The fourth proportional to 278,997.82, 385,020.23 and 154,821.35 is: 213,655.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,997.82 : 385,020.23 = 154,821.35 : x
  2. Step 2: Convert to fraction form
    278,997.82/385,020.23 = 154,821.35/x
  3. Step 3: Cross multiply
    278,997.82x = 385,020.23 × 154,821.35
  4. Step 4: Simplify right side
    278,997.82x = 59,609,350,679.49
  5. Step 5: Solve for x
    x = 59,609,350,679.49/278,997.82
  6. Step 6: Final answer
    x = 213,655.25

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1.5x scale

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.