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Finding the Fourth Proportional to 225.07, 310.49 and 155.20

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Solution

The fourth proportional to 225.07, 310.49 and 155.20 is: 214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.07 : 310.49 = 155.20 : x
  2. Step 2: Convert to fraction form
    225.07/310.49 = 155.20/x
  3. Step 3: Cross multiply
    225.07x = 310.49 × 155.20
  4. Step 4: Simplify right side
    225.07x = 48,187.27
  5. Step 5: Solve for x
    x = 48,187.27/225.07
  6. Step 6: Final answer
    x = 214.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.