Home / 278,640.29-384,641.33-188,118.88

Finding the Fourth Proportional to 278,640.29, 384,641.33 and 188,118.88

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Solution

The fourth proportional to 278,640.29, 384,641.33 and 188,118.88 is: 259,683.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,640.29 : 384,641.33 = 188,118.88 : x
  2. Step 2: Convert to fraction form
    278,640.29/384,641.33 = 188,118.88/x
  3. Step 3: Cross multiply
    278,640.29x = 384,641.33 × 188,118.88
  4. Step 4: Simplify right side
    278,640.29x = 72,358,294,299.11
  5. Step 5: Solve for x
    x = 72,358,294,299.11/278,640.29
  6. Step 6: Final answer
    x = 259,683.53

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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.