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Finding the Fourth Proportional to 392.50, 589.02 and 187.01

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Solution

The fourth proportional to 392.50, 589.02 and 187.01 is: 280.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.50 : 589.02 = 187.01 : x
  2. Step 2: Convert to fraction form
    392.50/589.02 = 187.01/x
  3. Step 3: Cross multiply
    392.50x = 589.02 × 187.01
  4. Step 4: Simplify right side
    392.50x = 110,152.24
  5. Step 5: Solve for x
    x = 110,152.24/392.50
  6. Step 6: Final answer
    x = 280.65

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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.