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Finding the Fourth Proportional to 768.22, 1,059.89 and 473.45

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Solution

The fourth proportional to 768.22, 1,059.89 and 473.45 is: 653.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.22 : 1,059.89 = 473.45 : x
  2. Step 2: Convert to fraction form
    768.22/1,059.89 = 473.45/x
  3. Step 3: Cross multiply
    768.22x = 1,059.89 × 473.45
  4. Step 4: Simplify right side
    768.22x = 501,797.25
  5. Step 5: Solve for x
    x = 501,797.25/768.22
  6. Step 6: Final answer
    x = 653.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.