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Finding the Fourth Proportional to 666,722, 920,076.36 and 364,916

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Solution

The fourth proportional to 666,722, 920,076.36 and 364,916 is: 503,584.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,722 : 920,076.36 = 364,916 : x
  2. Step 2: Convert to fraction form
    666,722/920,076.36 = 364,916/x
  3. Step 3: Cross multiply
    666,722x = 920,076.36 × 364,916
  4. Step 4: Simplify right side
    666,722x = 335,750,584,985.76
  5. Step 5: Solve for x
    x = 335,750,584,985.76/666,722
  6. Step 6: Final answer
    x = 503,584.08

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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.