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Finding the Fourth Proportional to 875.39, 1,208.12 and 482.49

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Solution

The fourth proportional to 875.39, 1,208.12 and 482.49 is: 665.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.39 : 1,208.12 = 482.49 : x
  2. Step 2: Convert to fraction form
    875.39/1,208.12 = 482.49/x
  3. Step 3: Cross multiply
    875.39x = 1,208.12 × 482.49
  4. Step 4: Simplify right side
    875.39x = 582,905.82
  5. Step 5: Solve for x
    x = 582,905.82/875.39
  6. Step 6: Final answer
    x = 665.88

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Double scale
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1.5x scale

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.