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Finding the Third Proportional to 637,428 and 1,379,400

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Solution

The third proportional to 637,428 and 1,379,400 is: 2,985,034.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,428 : 1,379,400 = 1,379,400 : x
  2. Step 2: Convert to fraction form
    637,428/1,379,400 = 1,379,400/x
  3. Step 3: Cross multiply
    637,428x = 1,379,400 × 1,379,400
  4. Step 4: Simplify right side
    637,428x = 1,902,744,360,000
  5. Step 5: Solve for x
    x = 1,902,744,360,000/637,428
  6. Step 6: Final answer
    x = 2,985,034.17

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.