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Finding the Third Proportional to 130,428 and 285,858

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Solution

The third proportional to 130,428 and 285,858 is: 626,512.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,428 : 285,858 = 285,858 : x
  2. Step 2: Convert to fraction form
    130,428/285,858 = 285,858/x
  3. Step 3: Cross multiply
    130,428x = 285,858 × 285,858
  4. Step 4: Simplify right side
    130,428x = 81,714,796,164
  5. Step 5: Solve for x
    x = 81,714,796,164/130,428
  6. Step 6: Final answer
    x = 626,512.68

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.