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Finding the Third Proportional to 858.09 and 1,390.13

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Solution

The third proportional to 858.09 and 1,390.13 is: 2,252.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.09 : 1,390.13 = 1,390.13 : x
  2. Step 2: Convert to fraction form
    858.09/1,390.13 = 1,390.13/x
  3. Step 3: Cross multiply
    858.09x = 1,390.13 × 1,390.13
  4. Step 4: Simplify right side
    858.09x = 1,932,463.81
  5. Step 5: Solve for x
    x = 1,932,463.81/858.09
  6. Step 6: Final answer
    x = 2,252.04

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.