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Finding the Fourth Proportional to 601.90, 902.31 and 211.66

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Solution

The fourth proportional to 601.90, 902.31 and 211.66 is: 317.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.90 : 902.31 = 211.66 : x
  2. Step 2: Convert to fraction form
    601.90/902.31 = 211.66/x
  3. Step 3: Cross multiply
    601.90x = 902.31 × 211.66
  4. Step 4: Simplify right side
    601.90x = 190,984.96
  5. Step 5: Solve for x
    x = 190,984.96/601.90
  6. Step 6: Final answer
    x = 317.30

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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.