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Finding the Fourth Proportional to 323,547.20, 485,320.80 and 165,723.20

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Solution

The fourth proportional to 323,547.20, 485,320.80 and 165,723.20 is: 248,584.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,547.20 : 485,320.80 = 165,723.20 : x
  2. Step 2: Convert to fraction form
    323,547.20/485,320.80 = 165,723.20/x
  3. Step 3: Cross multiply
    323,547.20x = 485,320.80 × 165,723.20
  4. Step 4: Simplify right side
    323,547.20x = 80,428,916,002.56
  5. Step 5: Solve for x
    x = 80,428,916,002.56/323,547.20
  6. Step 6: Final answer
    x = 248,584.80

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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.