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Finding the Fourth Proportional to 276,955.20, 415,432.80 and 99,489.60

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Solution

The fourth proportional to 276,955.20, 415,432.80 and 99,489.60 is: 149,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,955.20 : 415,432.80 = 99,489.60 : x
  2. Step 2: Convert to fraction form
    276,955.20/415,432.80 = 99,489.60/x
  3. Step 3: Cross multiply
    276,955.20x = 415,432.80 × 99,489.60
  4. Step 4: Simplify right side
    276,955.20x = 41,331,243,098.88
  5. Step 5: Solve for x
    x = 41,331,243,098.88/276,955.20
  6. Step 6: Final answer
    x = 149,234.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.