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Finding the Fourth Proportional to 889.25, 1,227.08 and 515.97

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Solution

The fourth proportional to 889.25, 1,227.08 and 515.97 is: 711.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.25 : 1,227.08 = 515.97 : x
  2. Step 2: Convert to fraction form
    889.25/1,227.08 = 515.97/x
  3. Step 3: Cross multiply
    889.25x = 1,227.08 × 515.97
  4. Step 4: Simplify right side
    889.25x = 633,137.76
  5. Step 5: Solve for x
    x = 633,137.76/889.25
  6. Step 6: Final answer
    x = 711.99

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.