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Finding the Fourth Proportional to 251.77, 347.41 and 152.20

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Solution

The fourth proportional to 251.77, 347.41 and 152.20 is: 210.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.77 : 347.41 = 152.20 : x
  2. Step 2: Convert to fraction form
    251.77/347.41 = 152.20/x
  3. Step 3: Cross multiply
    251.77x = 347.41 × 152.20
  4. Step 4: Simplify right side
    251.77x = 52,875.04
  5. Step 5: Solve for x
    x = 52,875.04/251.77
  6. Step 6: Final answer
    x = 210.02

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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.