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Finding the Third Proportional to 328,040 and 490,346

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Solution

The third proportional to 328,040 and 490,346 is: 732,956.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,040 : 490,346 = 490,346 : x
  2. Step 2: Convert to fraction form
    328,040/490,346 = 490,346/x
  3. Step 3: Cross multiply
    328,040x = 490,346 × 490,346
  4. Step 4: Simplify right side
    328,040x = 240,439,199,716
  5. Step 5: Solve for x
    x = 240,439,199,716/328,040
  6. Step 6: Final answer
    x = 732,956.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.