Home / 643,187.43-887,653.13-356,799.75

Finding the Fourth Proportional to 643,187.43, 887,653.13 and 356,799.75

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Solution

The fourth proportional to 643,187.43, 887,653.13 and 356,799.75 is: 492,413.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,187.43 : 887,653.13 = 356,799.75 : x
  2. Step 2: Convert to fraction form
    643,187.43/887,653.13 = 356,799.75/x
  3. Step 3: Cross multiply
    643,187.43x = 887,653.13 × 356,799.75
  4. Step 4: Simplify right side
    643,187.43x = 316,714,413,086.72
  5. Step 5: Solve for x
    x = 316,714,413,086.72/643,187.43
  6. Step 6: Final answer
    x = 492,413.87

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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.