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Finding the Third Proportional to 155,820 and 331,080

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Solution

The third proportional to 155,820 and 331,080 is: 703,465.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,820 : 331,080 = 331,080 : x
  2. Step 2: Convert to fraction form
    155,820/331,080 = 331,080/x
  3. Step 3: Cross multiply
    155,820x = 331,080 × 331,080
  4. Step 4: Simplify right side
    155,820x = 109,613,966,400
  5. Step 5: Solve for x
    x = 109,613,966,400/155,820
  6. Step 6: Final answer
    x = 703,465.32

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.