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Finding the Fourth Proportional to 251.28, 346.80 and 146.40

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Solution

The fourth proportional to 251.28, 346.80 and 146.40 is: 202.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.28 : 346.80 = 146.40 : x
  2. Step 2: Convert to fraction form
    251.28/346.80 = 146.40/x
  3. Step 3: Cross multiply
    251.28x = 346.80 × 146.40
  4. Step 4: Simplify right side
    251.28x = 50,771.52
  5. Step 5: Solve for x
    x = 50,771.52/251.28
  6. Step 6: Final answer
    x = 202.05

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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.