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Finding the Fourth Proportional to 782.63, 1,080.03 and 451.17

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Solution

The fourth proportional to 782.63, 1,080.03 and 451.17 is: 622.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.63 : 1,080.03 = 451.17 : x
  2. Step 2: Convert to fraction form
    782.63/1,080.03 = 451.17/x
  3. Step 3: Cross multiply
    782.63x = 1,080.03 × 451.17
  4. Step 4: Simplify right side
    782.63x = 487,278.83
  5. Step 5: Solve for x
    x = 487,278.83/782.63
  6. Step 6: Final answer
    x = 622.62

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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.