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Finding the Fourth Proportional to 58.59, 80.75 and 45.47

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Solution

The fourth proportional to 58.59, 80.75 and 45.47 is: 62.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.59 : 80.75 = 45.47 : x
  2. Step 2: Convert to fraction form
    58.59/80.75 = 45.47/x
  3. Step 3: Cross multiply
    58.59x = 80.75 × 45.47
  4. Step 4: Simplify right side
    58.59x = 3,672.02
  5. Step 5: Solve for x
    x = 3,672.02/58.59
  6. Step 6: Final answer
    x = 62.67

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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.