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Finding the Fourth Proportional to 643,700.68, 888,216.24 and 385,517.12

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Solution

The fourth proportional to 643,700.68, 888,216.24 and 385,517.12 is: 531,959.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,700.68 : 888,216.24 = 385,517.12 : x
  2. Step 2: Convert to fraction form
    643,700.68/888,216.24 = 385,517.12/x
  3. Step 3: Cross multiply
    643,700.68x = 888,216.24 × 385,517.12
  4. Step 4: Simplify right side
    643,700.68x = 342,422,566,782.03
  5. Step 5: Solve for x
    x = 342,422,566,782.03/643,700.68
  6. Step 6: Final answer
    x = 531,959.31

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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.