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Finding the Fourth Proportional to 58.41, 80.60 and 39

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Solution

The fourth proportional to 58.41, 80.60 and 39 is: 53.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.41 : 80.60 = 39 : x
  2. Step 2: Convert to fraction form
    58.41/80.60 = 39/x
  3. Step 3: Cross multiply
    58.41x = 80.60 × 39
  4. Step 4: Simplify right side
    58.41x = 3,143.21
  5. Step 5: Solve for x
    x = 3,143.21/58.41
  6. Step 6: Final answer
    x = 53.81

Related Problems

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.