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Finding the Third Proportional to 318,688 and 693,560

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Solution

The third proportional to 318,688 and 693,560 is: 1,509,393.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,688 : 693,560 = 693,560 : x
  2. Step 2: Convert to fraction form
    318,688/693,560 = 693,560/x
  3. Step 3: Cross multiply
    318,688x = 693,560 × 693,560
  4. Step 4: Simplify right side
    318,688x = 481,025,473,600
  5. Step 5: Solve for x
    x = 481,025,473,600/318,688
  6. Step 6: Final answer
    x = 1,509,393.12

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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.