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Finding the Fourth Proportional to 59.59, 89.40 and 39.40

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Solution

The fourth proportional to 59.59, 89.40 and 39.40 is: 59.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.59 : 89.40 = 39.40 : x
  2. Step 2: Convert to fraction form
    59.59/89.40 = 39.40/x
  3. Step 3: Cross multiply
    59.59x = 89.40 × 39.40
  4. Step 4: Simplify right side
    59.59x = 3,522.36
  5. Step 5: Solve for x
    x = 3,522.36/59.59
  6. Step 6: Final answer
    x = 59.11

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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.