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Finding the Third Proportional to 297,139.50 and 640,480.50

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Solution

The third proportional to 297,139.50 and 640,480.50 is: 1,380,547.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,139.50 : 640,480.50 = 640,480.50 : x
  2. Step 2: Convert to fraction form
    297,139.50/640,480.50 = 640,480.50/x
  3. Step 3: Cross multiply
    297,139.50x = 640,480.50 × 640,480.50
  4. Step 4: Simplify right side
    297,139.50x = 410,215,270,880.25
  5. Step 5: Solve for x
    x = 410,215,270,880.25/297,139.50
  6. Step 6: Final answer
    x = 1,380,547.76

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.