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Finding the Fourth Proportional to 538.14, 807.18 and 153.40

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Solution

The fourth proportional to 538.14, 807.18 and 153.40 is: 230.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.14 : 807.18 = 153.40 : x
  2. Step 2: Convert to fraction form
    538.14/807.18 = 153.40/x
  3. Step 3: Cross multiply
    538.14x = 807.18 × 153.40
  4. Step 4: Simplify right side
    538.14x = 123,821.41
  5. Step 5: Solve for x
    x = 123,821.41/538.14
  6. Step 6: Final answer
    x = 230.09

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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.