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Finding the Third Proportional to 508,516 and 690,630

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Solution

The third proportional to 508,516 and 690,630 is: 937,964.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,516 : 690,630 = 690,630 : x
  2. Step 2: Convert to fraction form
    508,516/690,630 = 690,630/x
  3. Step 3: Cross multiply
    508,516x = 690,630 × 690,630
  4. Step 4: Simplify right side
    508,516x = 476,969,796,900
  5. Step 5: Solve for x
    x = 476,969,796,900/508,516
  6. Step 6: Final answer
    x = 937,964.19

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.