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Finding the Third Proportional to 661,590 and 989,740

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Solution

The third proportional to 661,590 and 989,740 is: 1,480,653.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,590 : 989,740 = 989,740 : x
  2. Step 2: Convert to fraction form
    661,590/989,740 = 989,740/x
  3. Step 3: Cross multiply
    661,590x = 989,740 × 989,740
  4. Step 4: Simplify right side
    661,590x = 979,585,267,600
  5. Step 5: Solve for x
    x = 979,585,267,600/661,590
  6. Step 6: Final answer
    x = 1,480,653.07

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Why These Related Problems?

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