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Finding the Fourth Proportional to 485,056.28, 669,288.84 and 270,191

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Solution

The fourth proportional to 485,056.28, 669,288.84 and 270,191 is: 372,814.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,056.28 : 669,288.84 = 270,191 : x
  2. Step 2: Convert to fraction form
    485,056.28/669,288.84 = 270,191/x
  3. Step 3: Cross multiply
    485,056.28x = 669,288.84 × 270,191
  4. Step 4: Simplify right side
    485,056.28x = 180,835,820,968.44
  5. Step 5: Solve for x
    x = 180,835,820,968.44/485,056.28
  6. Step 6: Final answer
    x = 372,814.10

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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.