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Finding the Fourth Proportional to 440,657.28, 660,867.84 and 191,280

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Solution

The fourth proportional to 440,657.28, 660,867.84 and 191,280 is: 286,868.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,657.28 : 660,867.84 = 191,280 : x
  2. Step 2: Convert to fraction form
    440,657.28/660,867.84 = 191,280/x
  3. Step 3: Cross multiply
    440,657.28x = 660,867.84 × 191,280
  4. Step 4: Simplify right side
    440,657.28x = 126,410,800,435.20
  5. Step 5: Solve for x
    x = 126,410,800,435.20/440,657.28
  6. Step 6: Final answer
    x = 286,868.74

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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.