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Finding the Fourth Proportional to 58.28, 87.57 and 47.34

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Solution

The fourth proportional to 58.28, 87.57 and 47.34 is: 71.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.28 : 87.57 = 47.34 : x
  2. Step 2: Convert to fraction form
    58.28/87.57 = 47.34/x
  3. Step 3: Cross multiply
    58.28x = 87.57 × 47.34
  4. Step 4: Simplify right side
    58.28x = 4,145.58
  5. Step 5: Solve for x
    x = 4,145.58/58.28
  6. Step 6: Final answer
    x = 71.13

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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.