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Finding the Third Proportional to 291,721.50 and 426,411

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Solution

The third proportional to 291,721.50 and 426,411 is: 623,287.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,721.50 : 426,411 = 426,411 : x
  2. Step 2: Convert to fraction form
    291,721.50/426,411 = 426,411/x
  3. Step 3: Cross multiply
    291,721.50x = 426,411 × 426,411
  4. Step 4: Simplify right side
    291,721.50x = 181,826,340,921
  5. Step 5: Solve for x
    x = 181,826,340,921/291,721.50
  6. Step 6: Final answer
    x = 623,287.42

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.