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Finding the Fourth Proportional to 350.85, 526.31 and 90.89

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Solution

The fourth proportional to 350.85, 526.31 and 90.89 is: 136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.85 : 526.31 = 90.89 : x
  2. Step 2: Convert to fraction form
    350.85/526.31 = 90.89/x
  3. Step 3: Cross multiply
    350.85x = 526.31 × 90.89
  4. Step 4: Simplify right side
    350.85x = 47,833.23
  5. Step 5: Solve for x
    x = 47,833.23/350.85
  6. Step 6: Final answer
    x = 136.34

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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.