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Finding the Third Proportional to 400,390 and 879,528

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Solution

The third proportional to 400,390 and 879,528 is: 1,932,040.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,390 : 879,528 = 879,528 : x
  2. Step 2: Convert to fraction form
    400,390/879,528 = 879,528/x
  3. Step 3: Cross multiply
    400,390x = 879,528 × 879,528
  4. Step 4: Simplify right side
    400,390x = 773,569,502,784
  5. Step 5: Solve for x
    x = 773,569,502,784/400,390
  6. Step 6: Final answer
    x = 1,932,040.02

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.