Home / 643,221.18-887,699.67-356,833.50

Finding the Fourth Proportional to 643,221.18, 887,699.67 and 356,833.50

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Solution

The fourth proportional to 643,221.18, 887,699.67 and 356,833.50 is: 492,460.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,221.18 : 887,699.67 = 356,833.50 : x
  2. Step 2: Convert to fraction form
    643,221.18/887,699.67 = 356,833.50/x
  3. Step 3: Cross multiply
    643,221.18x = 887,699.67 × 356,833.50
  4. Step 4: Simplify right side
    643,221.18x = 316,760,980,194.95
  5. Step 5: Solve for x
    x = 316,760,980,194.95/643,221.18
  6. Step 6: Final answer
    x = 492,460.43

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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.