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Finding the Fourth Proportional to 251.07, 346.51 and 152.81

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Solution

The fourth proportional to 251.07, 346.51 and 152.81 is: 210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.07 : 346.51 = 152.81 : x
  2. Step 2: Convert to fraction form
    251.07/346.51 = 152.81/x
  3. Step 3: Cross multiply
    251.07x = 346.51 × 152.81
  4. Step 4: Simplify right side
    251.07x = 52,948.94
  5. Step 5: Solve for x
    x = 52,948.94/251.07
  6. Step 6: Final answer
    x = 210.90

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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.