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Finding the Fourth Proportional to 279,034.56, 385,257.76 and 187,291.44

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Solution

The fourth proportional to 279,034.56, 385,257.76 and 187,291.44 is: 258,589.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,034.56 : 385,257.76 = 187,291.44 : x
  2. Step 2: Convert to fraction form
    279,034.56/385,257.76 = 187,291.44/x
  3. Step 3: Cross multiply
    279,034.56x = 385,257.76 × 187,291.44
  4. Step 4: Simplify right side
    279,034.56x = 72,155,480,641.57
  5. Step 5: Solve for x
    x = 72,155,480,641.57/279,034.56
  6. Step 6: Final answer
    x = 258,589.76

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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.