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Finding the Fourth Proportional to 826.76, 1,138.56 and 810.56

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Solution

The fourth proportional to 826.76, 1,138.56 and 810.56 is: 1,116.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.76 : 1,138.56 = 810.56 : x
  2. Step 2: Convert to fraction form
    826.76/1,138.56 = 810.56/x
  3. Step 3: Cross multiply
    826.76x = 1,138.56 × 810.56
  4. Step 4: Simplify right side
    826.76x = 922,871.19
  5. Step 5: Solve for x
    x = 922,871.19/826.76
  6. Step 6: Final answer
    x = 1,116.25

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Half scale
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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.