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Finding the Fourth Proportional to 374.12, 561.03 and 287.99

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Solution

The fourth proportional to 374.12, 561.03 and 287.99 is: 431.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.12 : 561.03 = 287.99 : x
  2. Step 2: Convert to fraction form
    374.12/561.03 = 287.99/x
  3. Step 3: Cross multiply
    374.12x = 561.03 × 287.99
  4. Step 4: Simplify right side
    374.12x = 161,568.22
  5. Step 5: Solve for x
    x = 161,568.22/374.12
  6. Step 6: Final answer
    x = 431.87

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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.