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Finding the Fourth Proportional to 432.99, 649.43 and 173.02

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Solution

The fourth proportional to 432.99, 649.43 and 173.02 is: 259.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.99 : 649.43 = 173.02 : x
  2. Step 2: Convert to fraction form
    432.99/649.43 = 173.02/x
  3. Step 3: Cross multiply
    432.99x = 649.43 × 173.02
  4. Step 4: Simplify right side
    432.99x = 112,364.38
  5. Step 5: Solve for x
    x = 112,364.38/432.99
  6. Step 6: Final answer
    x = 259.51

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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.