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Finding the Fourth Proportional to 158.13, 216.78 and 155.37

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Solution

The fourth proportional to 158.13, 216.78 and 155.37 is: 213.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.13 : 216.78 = 155.37 : x
  2. Step 2: Convert to fraction form
    158.13/216.78 = 155.37/x
  3. Step 3: Cross multiply
    158.13x = 216.78 × 155.37
  4. Step 4: Simplify right side
    158.13x = 33,681.11
  5. Step 5: Solve for x
    x = 33,681.11/158.13
  6. Step 6: Final answer
    x = 213.00

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.