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Finding the Fourth Proportional to 959.76, 1,440.36 and 682.08

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Solution

The fourth proportional to 959.76, 1,440.36 and 682.08 is: 1,023.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.76 : 1,440.36 = 682.08 : x
  2. Step 2: Convert to fraction form
    959.76/1,440.36 = 682.08/x
  3. Step 3: Cross multiply
    959.76x = 1,440.36 × 682.08
  4. Step 4: Simplify right side
    959.76x = 982,440.75
  5. Step 5: Solve for x
    x = 982,440.75/959.76
  6. Step 6: Final answer
    x = 1,023.63

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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.