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Finding the Fourth Proportional to 251.60, 376.80 and 210.48

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Solution

The fourth proportional to 251.60, 376.80 and 210.48 is: 315.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.60 : 376.80 = 210.48 : x
  2. Step 2: Convert to fraction form
    251.60/376.80 = 210.48/x
  3. Step 3: Cross multiply
    251.60x = 376.80 × 210.48
  4. Step 4: Simplify right side
    251.60x = 79,308.86
  5. Step 5: Solve for x
    x = 79,308.86/251.60
  6. Step 6: Final answer
    x = 315.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.