Home / 643,056.12-887,413.86-356,618.52

Finding the Fourth Proportional to 643,056.12, 887,413.86 and 356,618.52

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Solution

The fourth proportional to 643,056.12, 887,413.86 and 356,618.52 is: 492,131.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,056.12 : 887,413.86 = 356,618.52 : x
  2. Step 2: Convert to fraction form
    643,056.12/887,413.86 = 356,618.52/x
  3. Step 3: Cross multiply
    643,056.12x = 887,413.86 × 356,618.52
  4. Step 4: Simplify right side
    643,056.12x = 316,468,217,380.69
  5. Step 5: Solve for x
    x = 316,468,217,380.69/643,056.12
  6. Step 6: Final answer
    x = 492,131.57

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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.