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Finding the Third Proportional to 858.75 and 1,210.88

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Solution

The third proportional to 858.75 and 1,210.88 is: 1,707.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.75 : 1,210.88 = 1,210.88 : x
  2. Step 2: Convert to fraction form
    858.75/1,210.88 = 1,210.88/x
  3. Step 3: Cross multiply
    858.75x = 1,210.88 × 1,210.88
  4. Step 4: Simplify right side
    858.75x = 1,466,218.27
  5. Step 5: Solve for x
    x = 1,466,218.27/858.75
  6. Step 6: Final answer
    x = 1,707.39

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.