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Finding the Third Proportional to 216,520 and 340,129

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Solution

The third proportional to 216,520 and 340,129 is: 534,305.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,520 : 340,129 = 340,129 : x
  2. Step 2: Convert to fraction form
    216,520/340,129 = 340,129/x
  3. Step 3: Cross multiply
    216,520x = 340,129 × 340,129
  4. Step 4: Simplify right side
    216,520x = 115,687,736,641
  5. Step 5: Solve for x
    x = 115,687,736,641/216,520
  6. Step 6: Final answer
    x = 534,305.08

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.