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Finding the Third Proportional to 302,890.50 and 440,239.50

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Solution

The third proportional to 302,890.50 and 440,239.50 is: 639,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,890.50 : 440,239.50 = 440,239.50 : x
  2. Step 2: Convert to fraction form
    302,890.50/440,239.50 = 440,239.50/x
  3. Step 3: Cross multiply
    302,890.50x = 440,239.50 × 440,239.50
  4. Step 4: Simplify right side
    302,890.50x = 193,810,817,360.25
  5. Step 5: Solve for x
    x = 193,810,817,360.25/302,890.50
  6. Step 6: Final answer
    x = 639,870.90

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.