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Finding the Fourth Proportional to 875.42, 1,208.14 and 482.46

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Solution

The fourth proportional to 875.42, 1,208.14 and 482.46 is: 665.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.42 : 1,208.14 = 482.46 : x
  2. Step 2: Convert to fraction form
    875.42/1,208.14 = 482.46/x
  3. Step 3: Cross multiply
    875.42x = 1,208.14 × 482.46
  4. Step 4: Simplify right side
    875.42x = 582,879.22
  5. Step 5: Solve for x
    x = 582,879.22/875.42
  6. Step 6: Final answer
    x = 665.83

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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.