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Finding the Fourth Proportional to 374.10, 561.15 and 326.10

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Solution

The fourth proportional to 374.10, 561.15 and 326.10 is: 489.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.10 : 561.15 = 326.10 : x
  2. Step 2: Convert to fraction form
    374.10/561.15 = 326.10/x
  3. Step 3: Cross multiply
    374.10x = 561.15 × 326.10
  4. Step 4: Simplify right side
    374.10x = 182,991.02
  5. Step 5: Solve for x
    x = 182,991.02/374.10
  6. Step 6: Final answer
    x = 489.15

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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.