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Finding the Third Proportional to 561.52 and 874.13

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Solution

The third proportional to 561.52 and 874.13 is: 1,360.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.52 : 874.13 = 874.13 : x
  2. Step 2: Convert to fraction form
    561.52/874.13 = 874.13/x
  3. Step 3: Cross multiply
    561.52x = 874.13 × 874.13
  4. Step 4: Simplify right side
    561.52x = 764,094.52
  5. Step 5: Solve for x
    x = 764,094.52/561.52
  6. Step 6: Final answer
    x = 1,360.77

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.