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Finding the Fourth Proportional to 432.65, 648.61 and 188.99

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Solution

The fourth proportional to 432.65, 648.61 and 188.99 is: 283.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.65 : 648.61 = 188.99 : x
  2. Step 2: Convert to fraction form
    432.65/648.61 = 188.99/x
  3. Step 3: Cross multiply
    432.65x = 648.61 × 188.99
  4. Step 4: Simplify right side
    432.65x = 122,580.80
  5. Step 5: Solve for x
    x = 122,580.80/432.65
  6. Step 6: Final answer
    x = 283.33

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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.