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Finding the Fourth Proportional to 251.07, 346.33 and 152.80

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Solution

The fourth proportional to 251.07, 346.33 and 152.80 is: 210.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.07 : 346.33 = 152.80 : x
  2. Step 2: Convert to fraction form
    251.07/346.33 = 152.80/x
  3. Step 3: Cross multiply
    251.07x = 346.33 × 152.80
  4. Step 4: Simplify right side
    251.07x = 52,919.22
  5. Step 5: Solve for x
    x = 52,919.22/251.07
  6. Step 6: Final answer
    x = 210.77

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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.