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Finding the Fourth Proportional to 59.28, 89.39 and 56.58

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Solution

The fourth proportional to 59.28, 89.39 and 56.58 is: 85.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.28 : 89.39 = 56.58 : x
  2. Step 2: Convert to fraction form
    59.28/89.39 = 56.58/x
  3. Step 3: Cross multiply
    59.28x = 89.39 × 56.58
  4. Step 4: Simplify right side
    59.28x = 5,057.40
  5. Step 5: Solve for x
    x = 5,057.40/59.28
  6. Step 6: Final answer
    x = 85.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.