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Finding the Third Proportional to 718,642.13 and 999,216

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Solution

The third proportional to 718,642.13 and 999,216 is: 1,389,332.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,642.13 : 999,216 = 999,216 : x
  2. Step 2: Convert to fraction form
    718,642.13/999,216 = 999,216/x
  3. Step 3: Cross multiply
    718,642.13x = 999,216 × 999,216
  4. Step 4: Simplify right side
    718,642.13x = 998,432,614,656
  5. Step 5: Solve for x
    x = 998,432,614,656/718,642.13
  6. Step 6: Final answer
    x = 1,389,332.16

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.