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Finding the Third Proportional to 421,339.50 and 910,021.50

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Solution

The third proportional to 421,339.50 and 910,021.50 is: 1,965,491.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,339.50 : 910,021.50 = 910,021.50 : x
  2. Step 2: Convert to fraction form
    421,339.50/910,021.50 = 910,021.50/x
  3. Step 3: Cross multiply
    421,339.50x = 910,021.50 × 910,021.50
  4. Step 4: Simplify right side
    421,339.50x = 828,139,130,462.25
  5. Step 5: Solve for x
    x = 828,139,130,462.25/421,339.50
  6. Step 6: Final answer
    x = 1,965,491.32

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.