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Finding the Third Proportional to 399,516 and 865,560

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Solution

The third proportional to 399,516 and 865,560 is: 1,875,254.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,516 : 865,560 = 865,560 : x
  2. Step 2: Convert to fraction form
    399,516/865,560 = 865,560/x
  3. Step 3: Cross multiply
    399,516x = 865,560 × 865,560
  4. Step 4: Simplify right side
    399,516x = 749,194,113,600
  5. Step 5: Solve for x
    x = 749,194,113,600/399,516
  6. Step 6: Final answer
    x = 1,875,254.34

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.