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Finding the Third Proportional to 280,528 and 423,704

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Solution

The third proportional to 280,528 and 423,704 is: 639,954.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,528 : 423,704 = 423,704 : x
  2. Step 2: Convert to fraction form
    280,528/423,704 = 423,704/x
  3. Step 3: Cross multiply
    280,528x = 423,704 × 423,704
  4. Step 4: Simplify right side
    280,528x = 179,525,079,616
  5. Step 5: Solve for x
    x = 179,525,079,616/280,528
  6. Step 6: Final answer
    x = 639,954.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.