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Finding the Fourth Proportional to 538.62, 807.78 and 148.53

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Solution

The fourth proportional to 538.62, 807.78 and 148.53 is: 222.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.62 : 807.78 = 148.53 : x
  2. Step 2: Convert to fraction form
    538.62/807.78 = 148.53/x
  3. Step 3: Cross multiply
    538.62x = 807.78 × 148.53
  4. Step 4: Simplify right side
    538.62x = 119,979.08
  5. Step 5: Solve for x
    x = 119,979.08/538.62
  6. Step 6: Final answer
    x = 222.75

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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.