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Finding the Fourth Proportional to 666,207.78, 919,388.28 and 364,401.78

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Solution

The fourth proportional to 666,207.78, 919,388.28 and 364,401.78 is: 502,886.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,207.78 : 919,388.28 = 364,401.78 : x
  2. Step 2: Convert to fraction form
    666,207.78/919,388.28 = 364,401.78/x
  3. Step 3: Cross multiply
    666,207.78x = 919,388.28 × 364,401.78
  4. Step 4: Simplify right side
    666,207.78x = 335,026,725,743.14
  5. Step 5: Solve for x
    x = 335,026,725,743.14/666,207.78
  6. Step 6: Final answer
    x = 502,886.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.