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Finding the Fourth Proportional to 889.49, 1,227.47 and 511.37

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Solution

The fourth proportional to 889.49, 1,227.47 and 511.37 is: 705.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.49 : 1,227.47 = 511.37 : x
  2. Step 2: Convert to fraction form
    889.49/1,227.47 = 511.37/x
  3. Step 3: Cross multiply
    889.49x = 1,227.47 × 511.37
  4. Step 4: Simplify right side
    889.49x = 627,691.33
  5. Step 5: Solve for x
    x = 627,691.33/889.49
  6. Step 6: Final answer
    x = 705.68

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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.