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Finding the Third Proportional to 389.63 and 898.13

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Solution

The third proportional to 389.63 and 898.13 is: 2,070.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.63 : 898.13 = 898.13 : x
  2. Step 2: Convert to fraction form
    389.63/898.13 = 898.13/x
  3. Step 3: Cross multiply
    389.63x = 898.13 × 898.13
  4. Step 4: Simplify right side
    389.63x = 806,628.52
  5. Step 5: Solve for x
    x = 806,628.52/389.63
  6. Step 6: Final answer
    x = 2,070.27

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.