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Finding the Third Proportional to 294,509 and 640,570

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Solution

The third proportional to 294,509 and 640,570 is: 1,393,267.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    294,509 : 640,570 = 640,570 : x
  2. Step 2: Convert to fraction form
    294,509/640,570 = 640,570/x
  3. Step 3: Cross multiply
    294,509x = 640,570 × 640,570
  4. Step 4: Simplify right side
    294,509x = 410,329,924,900
  5. Step 5: Solve for x
    x = 410,329,924,900/294,509
  6. Step 6: Final answer
    x = 1,393,267.86

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.