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Finding the Fourth Proportional to 494.21, 740.34 and 288.36

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Solution

The fourth proportional to 494.21, 740.34 and 288.36 is: 431.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.21 : 740.34 = 288.36 : x
  2. Step 2: Convert to fraction form
    494.21/740.34 = 288.36/x
  3. Step 3: Cross multiply
    494.21x = 740.34 × 288.36
  4. Step 4: Simplify right side
    494.21x = 213,484.44
  5. Step 5: Solve for x
    x = 213,484.44/494.21
  6. Step 6: Final answer
    x = 431.98

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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.