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Finding the Third Proportional to 257,720 and 392,050

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Solution

The third proportional to 257,720 and 392,050 is: 596,396.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,720 : 392,050 = 392,050 : x
  2. Step 2: Convert to fraction form
    257,720/392,050 = 392,050/x
  3. Step 3: Cross multiply
    257,720x = 392,050 × 392,050
  4. Step 4: Simplify right side
    257,720x = 153,703,202,500
  5. Step 5: Solve for x
    x = 153,703,202,500/257,720
  6. Step 6: Final answer
    x = 596,396.10

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.