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Finding the Fourth Proportional to 889.41, 1,227.42 and 496.47

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Solution

The fourth proportional to 889.41, 1,227.42 and 496.47 is: 685.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.41 : 1,227.42 = 496.47 : x
  2. Step 2: Convert to fraction form
    889.41/1,227.42 = 496.47/x
  3. Step 3: Cross multiply
    889.41x = 1,227.42 × 496.47
  4. Step 4: Simplify right side
    889.41x = 609,377.21
  5. Step 5: Solve for x
    x = 609,377.21/889.41
  6. Step 6: Final answer
    x = 685.15

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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.