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Finding the Fourth Proportional to 276,364.31, 381,378.32 and 155,505.52

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Solution

The fourth proportional to 276,364.31, 381,378.32 and 155,505.52 is: 214,595.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,364.31 : 381,378.32 = 155,505.52 : x
  2. Step 2: Convert to fraction form
    276,364.31/381,378.32 = 155,505.52/x
  3. Step 3: Cross multiply
    276,364.31x = 381,378.32 × 155,505.52
  4. Step 4: Simplify right side
    276,364.31x = 59,306,435,125.39
  5. Step 5: Solve for x
    x = 59,306,435,125.39/276,364.31
  6. Step 6: Final answer
    x = 214,595.13

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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.