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Finding the Third Proportional to 307,128.75 and 464,989.50

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Solution

The third proportional to 307,128.75 and 464,989.50 is: 703,988.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,128.75 : 464,989.50 = 464,989.50 : x
  2. Step 2: Convert to fraction form
    307,128.75/464,989.50 = 464,989.50/x
  3. Step 3: Cross multiply
    307,128.75x = 464,989.50 × 464,989.50
  4. Step 4: Simplify right side
    307,128.75x = 216,215,235,110.25
  5. Step 5: Solve for x
    x = 216,215,235,110.25/307,128.75
  6. Step 6: Final answer
    x = 703,988.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.