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Finding the Fourth Proportional to 39.60, 59.04 and 35.80

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Solution

The fourth proportional to 39.60, 59.04 and 35.80 is: 53.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.60 : 59.04 = 35.80 : x
  2. Step 2: Convert to fraction form
    39.60/59.04 = 35.80/x
  3. Step 3: Cross multiply
    39.60x = 59.04 × 35.80
  4. Step 4: Simplify right side
    39.60x = 2,113.63
  5. Step 5: Solve for x
    x = 2,113.63/39.60
  6. Step 6: Final answer
    x = 53.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.