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Finding the Fourth Proportional to 433, 649.60 and 144.40

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Solution

The fourth proportional to 433, 649.60 and 144.40 is: 216.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    433 : 649.60 = 144.40 : x
  2. Step 2: Convert to fraction form
    433/649.60 = 144.40/x
  3. Step 3: Cross multiply
    433x = 649.60 × 144.40
  4. Step 4: Simplify right side
    433x = 93,802.24
  5. Step 5: Solve for x
    x = 93,802.24/433
  6. Step 6: Final answer
    x = 216.63

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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.