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Finding the Fourth Proportional to 374.18, 561.28 and 203.18

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Solution

The fourth proportional to 374.18, 561.28 and 203.18 is: 304.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.18 : 561.28 = 203.18 : x
  2. Step 2: Convert to fraction form
    374.18/561.28 = 203.18/x
  3. Step 3: Cross multiply
    374.18x = 561.28 × 203.18
  4. Step 4: Simplify right side
    374.18x = 114,040.87
  5. Step 5: Solve for x
    x = 114,040.87/374.18
  6. Step 6: Final answer
    x = 304.78

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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.