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Finding the Fourth Proportional to 871.05, 1,201.41 and 576.75

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Solution

The fourth proportional to 871.05, 1,201.41 and 576.75 is: 795.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.05 : 1,201.41 = 576.75 : x
  2. Step 2: Convert to fraction form
    871.05/1,201.41 = 576.75/x
  3. Step 3: Cross multiply
    871.05x = 1,201.41 × 576.75
  4. Step 4: Simplify right side
    871.05x = 692,913.22
  5. Step 5: Solve for x
    x = 692,913.22/871.05
  6. Step 6: Final answer
    x = 795.49

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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.