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Finding the Third Proportional to 216,602 and 316,455

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Solution

The third proportional to 216,602 and 316,455 is: 462,339.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,602 : 316,455 = 316,455 : x
  2. Step 2: Convert to fraction form
    216,602/316,455 = 316,455/x
  3. Step 3: Cross multiply
    216,602x = 316,455 × 316,455
  4. Step 4: Simplify right side
    216,602x = 100,143,767,025
  5. Step 5: Solve for x
    x = 100,143,767,025/216,602
  6. Step 6: Final answer
    x = 462,339.99

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.