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Finding the Third Proportional to 399,280 and 873,584

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Solution

The third proportional to 399,280 and 873,584 is: 1,911,312.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,280 : 873,584 = 873,584 : x
  2. Step 2: Convert to fraction form
    399,280/873,584 = 873,584/x
  3. Step 3: Cross multiply
    399,280x = 873,584 × 873,584
  4. Step 4: Simplify right side
    399,280x = 763,149,005,056
  5. Step 5: Solve for x
    x = 763,149,005,056/399,280
  6. Step 6: Final answer
    x = 1,911,312.88

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.