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Finding the Fourth Proportional to 264.60, 397.80 and 211.08

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Solution

The fourth proportional to 264.60, 397.80 and 211.08 is: 317.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.60 : 397.80 = 211.08 : x
  2. Step 2: Convert to fraction form
    264.60/397.80 = 211.08/x
  3. Step 3: Cross multiply
    264.60x = 397.80 × 211.08
  4. Step 4: Simplify right side
    264.60x = 83,967.62
  5. Step 5: Solve for x
    x = 83,967.62/264.60
  6. Step 6: Final answer
    x = 317.34

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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.