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Finding the Fourth Proportional to 494.21, 740.40 and 356.60

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Solution

The fourth proportional to 494.21, 740.40 and 356.60 is: 534.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.21 : 740.40 = 356.60 : x
  2. Step 2: Convert to fraction form
    494.21/740.40 = 356.60/x
  3. Step 3: Cross multiply
    494.21x = 740.40 × 356.60
  4. Step 4: Simplify right side
    494.21x = 264,022.94
  5. Step 5: Solve for x
    x = 264,022.94/494.21
  6. Step 6: Final answer
    x = 534.24

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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.