Home / 641,965.25-885,901.14-355,479.18

Finding the Fourth Proportional to 641,965.25, 885,901.14 and 355,479.18

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Solution

The fourth proportional to 641,965.25, 885,901.14 and 355,479.18 is: 490,555.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,965.25 : 885,901.14 = 355,479.18 : x
  2. Step 2: Convert to fraction form
    641,965.25/885,901.14 = 355,479.18/x
  3. Step 3: Cross multiply
    641,965.25x = 885,901.14 × 355,479.18
  4. Step 4: Simplify right side
    641,965.25x = 314,919,410,808.27
  5. Step 5: Solve for x
    x = 314,919,410,808.27/641,965.25
  6. Step 6: Final answer
    x = 490,555.23

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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.