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Finding the Fourth Proportional to 276,000.40, 380,920.89 and 155,151.64

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Solution

The fourth proportional to 276,000.40, 380,920.89 and 155,151.64 is: 214,131.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,000.40 : 380,920.89 = 155,151.64 : x
  2. Step 2: Convert to fraction form
    276,000.40/380,920.89 = 155,151.64/x
  3. Step 3: Cross multiply
    276,000.40x = 380,920.89 × 155,151.64
  4. Step 4: Simplify right side
    276,000.40x = 59,100,500,793.76
  5. Step 5: Solve for x
    x = 59,100,500,793.76/276,000.40
  6. Step 6: Final answer
    x = 214,131.94

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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.