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Finding the Fourth Proportional to 485,399.12, 669,873.71 and 270,540.72

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Solution

The fourth proportional to 485,399.12, 669,873.71 and 270,540.72 is: 373,358.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,399.12 : 669,873.71 = 270,540.72 : x
  2. Step 2: Convert to fraction form
    485,399.12/669,873.71 = 270,540.72/x
  3. Step 3: Cross multiply
    485,399.12x = 669,873.71 × 270,540.72
  4. Step 4: Simplify right side
    485,399.12x = 181,228,115,812.47
  5. Step 5: Solve for x
    x = 181,228,115,812.47/485,399.12
  6. Step 6: Final answer
    x = 373,358.97

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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.