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Finding the Fourth Proportional to 515.73, 772.21 and 433.72

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Solution

The fourth proportional to 515.73, 772.21 and 433.72 is: 649.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.73 : 772.21 = 433.72 : x
  2. Step 2: Convert to fraction form
    515.73/772.21 = 433.72/x
  3. Step 3: Cross multiply
    515.73x = 772.21 × 433.72
  4. Step 4: Simplify right side
    515.73x = 334,924.20
  5. Step 5: Solve for x
    x = 334,924.20/515.73
  6. Step 6: Final answer
    x = 649.42

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1.5x scale

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.