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Finding the Fourth Proportional to 412.20, 614.88 and 371.16

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Solution

The fourth proportional to 412.20, 614.88 and 371.16 is: 553.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.20 : 614.88 = 371.16 : x
  2. Step 2: Convert to fraction form
    412.20/614.88 = 371.16/x
  3. Step 3: Cross multiply
    412.20x = 614.88 × 371.16
  4. Step 4: Simplify right side
    412.20x = 228,218.86
  5. Step 5: Solve for x
    x = 228,218.86/412.20
  6. Step 6: Final answer
    x = 553.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.