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Finding the Fourth Proportional to 276,364.58, 381,378.57 and 155,505.74

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Solution

The fourth proportional to 276,364.58, 381,378.57 and 155,505.74 is: 214,595.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,364.58 : 381,378.57 = 155,505.74 : x
  2. Step 2: Convert to fraction form
    276,364.58/381,378.57 = 155,505.74/x
  3. Step 3: Cross multiply
    276,364.58x = 381,378.57 × 155,505.74
  4. Step 4: Simplify right side
    276,364.58x = 59,306,556,747.99
  5. Step 5: Solve for x
    x = 59,306,556,747.99/276,364.58
  6. Step 6: Final answer
    x = 214,595.36

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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.