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Finding the Fourth Proportional to 39.21, 58.74 and 35.02

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Solution

The fourth proportional to 39.21, 58.74 and 35.02 is: 52.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.21 : 58.74 = 35.02 : x
  2. Step 2: Convert to fraction form
    39.21/58.74 = 35.02/x
  3. Step 3: Cross multiply
    39.21x = 58.74 × 35.02
  4. Step 4: Simplify right side
    39.21x = 2,057.07
  5. Step 5: Solve for x
    x = 2,057.07/39.21
  6. Step 6: Final answer
    x = 52.46

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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.