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Finding the Fourth Proportional to 889.36, 1,227.18 and 535.20

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Solution

The fourth proportional to 889.36, 1,227.18 and 535.20 is: 738.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.36 : 1,227.18 = 535.20 : x
  2. Step 2: Convert to fraction form
    889.36/1,227.18 = 535.20/x
  3. Step 3: Cross multiply
    889.36x = 1,227.18 × 535.20
  4. Step 4: Simplify right side
    889.36x = 656,786.74
  5. Step 5: Solve for x
    x = 656,786.74/889.36
  6. Step 6: Final answer
    x = 738.49

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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.