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Finding the Third Proportional to 213,132 and 312,786

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Solution

The third proportional to 213,132 and 312,786 is: 459,035.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,132 : 312,786 = 312,786 : x
  2. Step 2: Convert to fraction form
    213,132/312,786 = 312,786/x
  3. Step 3: Cross multiply
    213,132x = 312,786 × 312,786
  4. Step 4: Simplify right side
    213,132x = 97,835,081,796
  5. Step 5: Solve for x
    x = 97,835,081,796/213,132
  6. Step 6: Final answer
    x = 459,035.16

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.