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Finding the Fourth Proportional to 867.87, 1,197.47 and 494.71

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Solution

The fourth proportional to 867.87, 1,197.47 and 494.71 is: 682.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.87 : 1,197.47 = 494.71 : x
  2. Step 2: Convert to fraction form
    867.87/1,197.47 = 494.71/x
  3. Step 3: Cross multiply
    867.87x = 1,197.47 × 494.71
  4. Step 4: Simplify right side
    867.87x = 592,398.63
  5. Step 5: Solve for x
    x = 592,398.63/867.87
  6. Step 6: Final answer
    x = 682.59

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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.