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Finding the Fourth Proportional to 889.96, 1,228.08 and 540.76

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Solution

The fourth proportional to 889.96, 1,228.08 and 540.76 is: 746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.96 : 1,228.08 = 540.76 : x
  2. Step 2: Convert to fraction form
    889.96/1,228.08 = 540.76/x
  3. Step 3: Cross multiply
    889.96x = 1,228.08 × 540.76
  4. Step 4: Simplify right side
    889.96x = 664,096.54
  5. Step 5: Solve for x
    x = 664,096.54/889.96
  6. Step 6: Final answer
    x = 746.21

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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.