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Finding the Third Proportional to 657,990 and 891,618

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Solution

The third proportional to 657,990 and 891,618 is: 1,208,198.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,990 : 891,618 = 891,618 : x
  2. Step 2: Convert to fraction form
    657,990/891,618 = 891,618/x
  3. Step 3: Cross multiply
    657,990x = 891,618 × 891,618
  4. Step 4: Simplify right side
    657,990x = 794,982,657,924
  5. Step 5: Solve for x
    x = 794,982,657,924/657,990
  6. Step 6: Final answer
    x = 1,208,198.69

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.