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Finding the Fourth Proportional to 875.32, 1,207.94 and 482.38

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Solution

The fourth proportional to 875.32, 1,207.94 and 482.38 is: 665.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.32 : 1,207.94 = 482.38 : x
  2. Step 2: Convert to fraction form
    875.32/1,207.94 = 482.38/x
  3. Step 3: Cross multiply
    875.32x = 1,207.94 × 482.38
  4. Step 4: Simplify right side
    875.32x = 582,686.10
  5. Step 5: Solve for x
    x = 582,686.10/875.32
  6. Step 6: Final answer
    x = 665.68

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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.