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Finding the Fourth Proportional to 374.60, 514.54 and 308.96

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Solution

The fourth proportional to 374.60, 514.54 and 308.96 is: 424.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.60 : 514.54 = 308.96 : x
  2. Step 2: Convert to fraction form
    374.60/514.54 = 308.96/x
  3. Step 3: Cross multiply
    374.60x = 514.54 × 308.96
  4. Step 4: Simplify right side
    374.60x = 158,972.28
  5. Step 5: Solve for x
    x = 158,972.28/374.60
  6. Step 6: Final answer
    x = 424.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.