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Finding the Fourth Proportional to 491.28, 735.36 and 274.20

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Solution

The fourth proportional to 491.28, 735.36 and 274.20 is: 410.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.28 : 735.36 = 274.20 : x
  2. Step 2: Convert to fraction form
    491.28/735.36 = 274.20/x
  3. Step 3: Cross multiply
    491.28x = 735.36 × 274.20
  4. Step 4: Simplify right side
    491.28x = 201,635.71
  5. Step 5: Solve for x
    x = 201,635.71/491.28
  6. Step 6: Final answer
    x = 410.43

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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.