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Finding the Fourth Proportional to 666,926.31, 920,474.64 and 395,147.22

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Solution

The fourth proportional to 666,926.31, 920,474.64 and 395,147.22 is: 545,372.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,926.31 : 920,474.64 = 395,147.22 : x
  2. Step 2: Convert to fraction form
    666,926.31/920,474.64 = 395,147.22/x
  3. Step 3: Cross multiply
    666,926.31x = 920,474.64 × 395,147.22
  4. Step 4: Simplify right side
    666,926.31x = 363,722,995,076.50
  5. Step 5: Solve for x
    x = 363,722,995,076.50/666,926.31
  6. Step 6: Final answer
    x = 545,372.09

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1.5x scale

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.