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Finding the Third Proportional to 921,364 and 1,421,409

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Solution

The third proportional to 921,364 and 1,421,409 is: 2,192,839.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,364 : 1,421,409 = 1,421,409 : x
  2. Step 2: Convert to fraction form
    921,364/1,421,409 = 1,421,409/x
  3. Step 3: Cross multiply
    921,364x = 1,421,409 × 1,421,409
  4. Step 4: Simplify right side
    921,364x = 2,020,403,545,281
  5. Step 5: Solve for x
    x = 2,020,403,545,281/921,364
  6. Step 6: Final answer
    x = 2,192,839.69

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.