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Finding the Third Proportional to 216,290 and 336,072

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Solution

The third proportional to 216,290 and 336,072 is: 522,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,290 : 336,072 = 336,072 : x
  2. Step 2: Convert to fraction form
    216,290/336,072 = 336,072/x
  3. Step 3: Cross multiply
    216,290x = 336,072 × 336,072
  4. Step 4: Simplify right side
    216,290x = 112,944,389,184
  5. Step 5: Solve for x
    x = 112,944,389,184/216,290
  6. Step 6: Final answer
    x = 522,189.60

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.