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Finding the Fourth Proportional to 187.07, 280.50 and 77.32

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Solution

The fourth proportional to 187.07, 280.50 and 77.32 is: 115.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.07 : 280.50 = 77.32 : x
  2. Step 2: Convert to fraction form
    187.07/280.50 = 77.32/x
  3. Step 3: Cross multiply
    187.07x = 280.50 × 77.32
  4. Step 4: Simplify right side
    187.07x = 21,688.26
  5. Step 5: Solve for x
    x = 21,688.26/187.07
  6. Step 6: Final answer
    x = 115.94

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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.