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Finding the Third Proportional to 390,885.75 and 587,266.88

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Solution

The third proportional to 390,885.75 and 587,266.88 is: 882,309.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,885.75 : 587,266.88 = 587,266.88 : x
  2. Step 2: Convert to fraction form
    390,885.75/587,266.88 = 587,266.88/x
  3. Step 3: Cross multiply
    390,885.75x = 587,266.88 × 587,266.88
  4. Step 4: Simplify right side
    390,885.75x = 344,882,382,472.27
  5. Step 5: Solve for x
    x = 344,882,382,472.27/390,885.75
  6. Step 6: Final answer
    x = 882,309.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.