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Finding the Third Proportional to 978,288 and 1,286,440

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Solution

The third proportional to 978,288 and 1,286,440 is: 1,691,657.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,288 : 1,286,440 = 1,286,440 : x
  2. Step 2: Convert to fraction form
    978,288/1,286,440 = 1,286,440/x
  3. Step 3: Cross multiply
    978,288x = 1,286,440 × 1,286,440
  4. Step 4: Simplify right side
    978,288x = 1,654,927,873,600
  5. Step 5: Solve for x
    x = 1,654,927,873,600/978,288
  6. Step 6: Final answer
    x = 1,691,657.13

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These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.