Home / 643,575.24-888,035.20-385,391.72

Finding the Fourth Proportional to 643,575.24, 888,035.20 and 385,391.72

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Solution

The fourth proportional to 643,575.24, 888,035.20 and 385,391.72 is: 531,781.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,575.24 : 888,035.20 = 385,391.72 : x
  2. Step 2: Convert to fraction form
    643,575.24/888,035.20 = 385,391.72/x
  3. Step 3: Cross multiply
    643,575.24x = 888,035.20 × 385,391.72
  4. Step 4: Simplify right side
    643,575.24x = 342,241,414,405.15
  5. Step 5: Solve for x
    x = 342,241,414,405.15/643,575.24
  6. Step 6: Final answer
    x = 531,781.51

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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.