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Finding the Third Proportional to 290,346 and 432,396

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Solution

The third proportional to 290,346 and 432,396 is: 643,943.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,346 : 432,396 = 432,396 : x
  2. Step 2: Convert to fraction form
    290,346/432,396 = 432,396/x
  3. Step 3: Cross multiply
    290,346x = 432,396 × 432,396
  4. Step 4: Simplify right side
    290,346x = 186,966,300,816
  5. Step 5: Solve for x
    x = 186,966,300,816/290,346
  6. Step 6: Final answer
    x = 643,943.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.