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Finding the Third Proportional to 661,278 and 989,358

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Solution

The third proportional to 661,278 and 989,358 is: 1,480,208.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,278 : 989,358 = 989,358 : x
  2. Step 2: Convert to fraction form
    661,278/989,358 = 989,358/x
  3. Step 3: Cross multiply
    661,278x = 989,358 × 989,358
  4. Step 4: Simplify right side
    661,278x = 978,829,252,164
  5. Step 5: Solve for x
    x = 978,829,252,164/661,278
  6. Step 6: Final answer
    x = 1,480,208.40

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.