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Finding the Third Proportional to 645,889.50 and 1,390,491

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Solution

The third proportional to 645,889.50 and 1,390,491 is: 2,993,492.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,889.50 : 1,390,491 = 1,390,491 : x
  2. Step 2: Convert to fraction form
    645,889.50/1,390,491 = 1,390,491/x
  3. Step 3: Cross multiply
    645,889.50x = 1,390,491 × 1,390,491
  4. Step 4: Simplify right side
    645,889.50x = 1,933,465,221,081
  5. Step 5: Solve for x
    x = 1,933,465,221,081/645,889.50
  6. Step 6: Final answer
    x = 2,993,492.26

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.