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Finding the Third Proportional to 128,808 and 279,056.25

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Solution

The third proportional to 128,808 and 279,056.25 is: 604,561.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,808 : 279,056.25 = 279,056.25 : x
  2. Step 2: Convert to fraction form
    128,808/279,056.25 = 279,056.25/x
  3. Step 3: Cross multiply
    128,808x = 279,056.25 × 279,056.25
  4. Step 4: Simplify right side
    128,808x = 77,872,390,664.06
  5. Step 5: Solve for x
    x = 77,872,390,664.06/128,808
  6. Step 6: Final answer
    x = 604,561.76

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.