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Finding the Fourth Proportional to 875.08, 1,207.56 and 482.05

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Solution

The fourth proportional to 875.08, 1,207.56 and 482.05 is: 665.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.08 : 1,207.56 = 482.05 : x
  2. Step 2: Convert to fraction form
    875.08/1,207.56 = 482.05/x
  3. Step 3: Cross multiply
    875.08x = 1,207.56 × 482.05
  4. Step 4: Simplify right side
    875.08x = 582,104.30
  5. Step 5: Solve for x
    x = 582,104.30/875.08
  6. Step 6: Final answer
    x = 665.20

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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.