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Finding the Fourth Proportional to 374.21, 560.40 and 308.81

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Solution

The fourth proportional to 374.21, 560.40 and 308.81 is: 462.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.21 : 560.40 = 308.81 : x
  2. Step 2: Convert to fraction form
    374.21/560.40 = 308.81/x
  3. Step 3: Cross multiply
    374.21x = 560.40 × 308.81
  4. Step 4: Simplify right side
    374.21x = 173,057.12
  5. Step 5: Solve for x
    x = 173,057.12/374.21
  6. Step 6: Final answer
    x = 462.46

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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.