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Finding the Fourth Proportional to 682.30, 1,023.45 and 451.45

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Solution

The fourth proportional to 682.30, 1,023.45 and 451.45 is: 677.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.30 : 1,023.45 = 451.45 : x
  2. Step 2: Convert to fraction form
    682.30/1,023.45 = 451.45/x
  3. Step 3: Cross multiply
    682.30x = 1,023.45 × 451.45
  4. Step 4: Simplify right side
    682.30x = 462,036.50
  5. Step 5: Solve for x
    x = 462,036.50/682.30
  6. Step 6: Final answer
    x = 677.18

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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.