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Finding the Fourth Proportional to 145.57, 218.37 and 49.39

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Solution

The fourth proportional to 145.57, 218.37 and 49.39 is: 74.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.57 : 218.37 = 49.39 : x
  2. Step 2: Convert to fraction form
    145.57/218.37 = 49.39/x
  3. Step 3: Cross multiply
    145.57x = 218.37 × 49.39
  4. Step 4: Simplify right side
    145.57x = 10,785.29
  5. Step 5: Solve for x
    x = 10,785.29/145.57
  6. Step 6: Final answer
    x = 74.09

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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.