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Finding the Fourth Proportional to 649.80, 973.86 and 433.56

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Solution

The fourth proportional to 649.80, 973.86 and 433.56 is: 649.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.80 : 973.86 = 433.56 : x
  2. Step 2: Convert to fraction form
    649.80/973.86 = 433.56/x
  3. Step 3: Cross multiply
    649.80x = 973.86 × 433.56
  4. Step 4: Simplify right side
    649.80x = 422,226.74
  5. Step 5: Solve for x
    x = 422,226.74/649.80
  6. Step 6: Final answer
    x = 649.78

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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.