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Finding the Third Proportional to 874.69 and 1,312.88

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Solution

The third proportional to 874.69 and 1,312.88 is: 1,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.69 : 1,312.88 = 1,312.88 : x
  2. Step 2: Convert to fraction form
    874.69/1,312.88 = 1,312.88/x
  3. Step 3: Cross multiply
    874.69x = 1,312.88 × 1,312.88
  4. Step 4: Simplify right side
    874.69x = 1,723,640.77
  5. Step 5: Solve for x
    x = 1,723,640.77/874.69
  6. Step 6: Final answer
    x = 1,970.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.