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Finding the Fourth Proportional to 409.36, 614.08 and 152.80

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Solution

The fourth proportional to 409.36, 614.08 and 152.80 is: 229.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.36 : 614.08 = 152.80 : x
  2. Step 2: Convert to fraction form
    409.36/614.08 = 152.80/x
  3. Step 3: Cross multiply
    409.36x = 614.08 × 152.80
  4. Step 4: Simplify right side
    409.36x = 93,831.42
  5. Step 5: Solve for x
    x = 93,831.42/409.36
  6. Step 6: Final answer
    x = 229.21

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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.