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Finding the Third Proportional to 292,188 and 390,168

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Solution

The third proportional to 292,188 and 390,168 is: 521,003.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,188 : 390,168 = 390,168 : x
  2. Step 2: Convert to fraction form
    292,188/390,168 = 390,168/x
  3. Step 3: Cross multiply
    292,188x = 390,168 × 390,168
  4. Step 4: Simplify right side
    292,188x = 152,231,068,224
  5. Step 5: Solve for x
    x = 152,231,068,224/292,188
  6. Step 6: Final answer
    x = 521,003.83

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.