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Finding the Fourth Proportional to 491.39, 677.89 and 294.56

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Solution

The fourth proportional to 491.39, 677.89 and 294.56 is: 406.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.39 : 677.89 = 294.56 : x
  2. Step 2: Convert to fraction form
    491.39/677.89 = 294.56/x
  3. Step 3: Cross multiply
    491.39x = 677.89 × 294.56
  4. Step 4: Simplify right side
    491.39x = 199,679.28
  5. Step 5: Solve for x
    x = 199,679.28/491.39
  6. Step 6: Final answer
    x = 406.36

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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.