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Finding the Fourth Proportional to 682.63, 1,023.94 and 561.63

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Solution

The fourth proportional to 682.63, 1,023.94 and 561.63 is: 842.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.63 : 1,023.94 = 561.63 : x
  2. Step 2: Convert to fraction form
    682.63/1,023.94 = 561.63/x
  3. Step 3: Cross multiply
    682.63x = 1,023.94 × 561.63
  4. Step 4: Simplify right side
    682.63x = 575,079.96
  5. Step 5: Solve for x
    x = 575,079.96/682.63
  6. Step 6: Final answer
    x = 842.45

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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.