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Finding the Fourth Proportional to 660.30, 991.26 and 626.28

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Solution

The fourth proportional to 660.30, 991.26 and 626.28 is: 940.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.30 : 991.26 = 626.28 : x
  2. Step 2: Convert to fraction form
    660.30/991.26 = 626.28/x
  3. Step 3: Cross multiply
    660.30x = 991.26 × 626.28
  4. Step 4: Simplify right side
    660.30x = 620,806.31
  5. Step 5: Solve for x
    x = 620,806.31/660.30
  6. Step 6: Final answer
    x = 940.19

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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.