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Finding the Fourth Proportional to 934.13, 1,398.69 and 494.48

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Solution

The fourth proportional to 934.13, 1,398.69 and 494.48 is: 740.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.13 : 1,398.69 = 494.48 : x
  2. Step 2: Convert to fraction form
    934.13/1,398.69 = 494.48/x
  3. Step 3: Cross multiply
    934.13x = 1,398.69 × 494.48
  4. Step 4: Simplify right side
    934.13x = 691,617.24
  5. Step 5: Solve for x
    x = 691,617.24/934.13
  6. Step 6: Final answer
    x = 740.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.