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Finding the Fourth Proportional to 682.76, 1,015.48 and 669.69

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Solution

The fourth proportional to 682.76, 1,015.48 and 669.69 is: 996.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.76 : 1,015.48 = 669.69 : x
  2. Step 2: Convert to fraction form
    682.76/1,015.48 = 669.69/x
  3. Step 3: Cross multiply
    682.76x = 1,015.48 × 669.69
  4. Step 4: Simplify right side
    682.76x = 680,053.45
  5. Step 5: Solve for x
    x = 680,053.45/682.76
  6. Step 6: Final answer
    x = 996.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.