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Finding the Fourth Proportional to 276,624.74, 381,778.52 and 155,789.65

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Solution

The fourth proportional to 276,624.74, 381,778.52 and 155,789.65 is: 215,010.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,624.74 : 381,778.52 = 155,789.65 : x
  2. Step 2: Convert to fraction form
    276,624.74/381,778.52 = 155,789.65/x
  3. Step 3: Cross multiply
    276,624.74x = 381,778.52 × 155,789.65
  4. Step 4: Simplify right side
    276,624.74x = 59,477,139,559.09
  5. Step 5: Solve for x
    x = 59,477,139,559.09/276,624.74
  6. Step 6: Final answer
    x = 215,010.20

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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.