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Finding the Fourth Proportional to 276,740.67, 381,859.95 and 155,874.30

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Solution

The fourth proportional to 276,740.67, 381,859.95 and 155,874.30 is: 215,082.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,740.67 : 381,859.95 = 155,874.30 : x
  2. Step 2: Convert to fraction form
    276,740.67/381,859.95 = 155,874.30/x
  3. Step 3: Cross multiply
    276,740.67x = 381,859.95 × 155,874.30
  4. Step 4: Simplify right side
    276,740.67x = 59,522,152,404.29
  5. Step 5: Solve for x
    x = 59,522,152,404.29/276,740.67
  6. Step 6: Final answer
    x = 215,082.78

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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.