Home / 667,943.28-921,799.44-396,172.08

Finding the Fourth Proportional to 667,943.28, 921,799.44 and 396,172.08

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Solution

The fourth proportional to 667,943.28, 921,799.44 and 396,172.08 is: 546,739.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,943.28 : 921,799.44 = 396,172.08 : x
  2. Step 2: Convert to fraction form
    667,943.28/921,799.44 = 396,172.08/x
  3. Step 3: Cross multiply
    667,943.28x = 921,799.44 × 396,172.08
  4. Step 4: Simplify right side
    667,943.28x = 365,191,201,487.64
  5. Step 5: Solve for x
    x = 365,191,201,487.64/667,943.28
  6. Step 6: Final answer
    x = 546,739.84

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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.