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Finding the Fourth Proportional to 491.17, 677.87 and 294.70

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Solution

The fourth proportional to 491.17, 677.87 and 294.70 is: 406.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.17 : 677.87 = 294.70 : x
  2. Step 2: Convert to fraction form
    491.17/677.87 = 294.70/x
  3. Step 3: Cross multiply
    491.17x = 677.87 × 294.70
  4. Step 4: Simplify right side
    491.17x = 199,768.29
  5. Step 5: Solve for x
    x = 199,768.29/491.17
  6. Step 6: Final answer
    x = 406.72

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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.