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Finding the Fourth Proportional to 810.28, 1,118.28 and 548.92

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Solution

The fourth proportional to 810.28, 1,118.28 and 548.92 is: 757.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.28 : 1,118.28 = 548.92 : x
  2. Step 2: Convert to fraction form
    810.28/1,118.28 = 548.92/x
  3. Step 3: Cross multiply
    810.28x = 1,118.28 × 548.92
  4. Step 4: Simplify right side
    810.28x = 613,846.26
  5. Step 5: Solve for x
    x = 613,846.26/810.28
  6. Step 6: Final answer
    x = 757.57

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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.