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Finding the Fourth Proportional to 410.55, 614.46 and 342.21

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Solution

The fourth proportional to 410.55, 614.46 and 342.21 is: 512.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.55 : 614.46 = 342.21 : x
  2. Step 2: Convert to fraction form
    410.55/614.46 = 342.21/x
  3. Step 3: Cross multiply
    410.55x = 614.46 × 342.21
  4. Step 4: Simplify right side
    410.55x = 210,274.36
  5. Step 5: Solve for x
    x = 210,274.36/410.55
  6. Step 6: Final answer
    x = 512.18

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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.