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Finding the Third Proportional to 917,892 and 1,988,328

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Solution

The third proportional to 917,892 and 1,988,328 is: 4,307,095.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,892 : 1,988,328 = 1,988,328 : x
  2. Step 2: Convert to fraction form
    917,892/1,988,328 = 1,988,328/x
  3. Step 3: Cross multiply
    917,892x = 1,988,328 × 1,988,328
  4. Step 4: Simplify right side
    917,892x = 3,953,448,235,584
  5. Step 5: Solve for x
    x = 3,953,448,235,584/917,892
  6. Step 6: Final answer
    x = 4,307,095.21

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.