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Finding the Third Proportional to 477,440 and 646,128

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Solution

The third proportional to 477,440 and 646,128 is: 874,416.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,440 : 646,128 = 646,128 : x
  2. Step 2: Convert to fraction form
    477,440/646,128 = 646,128/x
  3. Step 3: Cross multiply
    477,440x = 646,128 × 646,128
  4. Step 4: Simplify right side
    477,440x = 417,481,392,384
  5. Step 5: Solve for x
    x = 417,481,392,384/477,440
  6. Step 6: Final answer
    x = 874,416.46

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.