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Finding the Fourth Proportional to 765.96, 1,056.96 and 451.23

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Solution

The fourth proportional to 765.96, 1,056.96 and 451.23 is: 622.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.96 : 1,056.96 = 451.23 : x
  2. Step 2: Convert to fraction form
    765.96/1,056.96 = 451.23/x
  3. Step 3: Cross multiply
    765.96x = 1,056.96 × 451.23
  4. Step 4: Simplify right side
    765.96x = 476,932.06
  5. Step 5: Solve for x
    x = 476,932.06/765.96
  6. Step 6: Final answer
    x = 622.66

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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.