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Finding the Third Proportional to 561,509 and 1,221,400.50

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Solution

The third proportional to 561,509 and 1,221,400.50 is: 2,656,803.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,509 : 1,221,400.50 = 1,221,400.50 : x
  2. Step 2: Convert to fraction form
    561,509/1,221,400.50 = 1,221,400.50/x
  3. Step 3: Cross multiply
    561,509x = 1,221,400.50 × 1,221,400.50
  4. Step 4: Simplify right side
    561,509x = 1,491,819,181,400.25
  5. Step 5: Solve for x
    x = 1,491,819,181,400.25/561,509
  6. Step 6: Final answer
    x = 2,656,803.69

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.