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Finding the Third Proportional to 261,621 and 392,431.50

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Solution

The third proportional to 261,621 and 392,431.50 is: 588,647.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,621 : 392,431.50 = 392,431.50 : x
  2. Step 2: Convert to fraction form
    261,621/392,431.50 = 392,431.50/x
  3. Step 3: Cross multiply
    261,621x = 392,431.50 × 392,431.50
  4. Step 4: Simplify right side
    261,621x = 154,002,482,192.25
  5. Step 5: Solve for x
    x = 154,002,482,192.25/261,621
  6. Step 6: Final answer
    x = 588,647.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.