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Finding the Fourth Proportional to 949.88, 1,424.64 and 926.60

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Solution

The fourth proportional to 949.88, 1,424.64 and 926.60 is: 1,389.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.88 : 1,424.64 = 926.60 : x
  2. Step 2: Convert to fraction form
    949.88/1,424.64 = 926.60/x
  3. Step 3: Cross multiply
    949.88x = 1,424.64 × 926.60
  4. Step 4: Simplify right side
    949.88x = 1,320,071.42
  5. Step 5: Solve for x
    x = 1,320,071.42/949.88
  6. Step 6: Final answer
    x = 1,389.72

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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.