Home / 278,639.45-384,640.16-188,118.03

Finding the Fourth Proportional to 278,639.45, 384,640.16 and 188,118.03

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Solution

The fourth proportional to 278,639.45, 384,640.16 and 188,118.03 is: 259,682.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,639.45 : 384,640.16 = 188,118.03 : x
  2. Step 2: Convert to fraction form
    278,639.45/384,640.16 = 188,118.03/x
  3. Step 3: Cross multiply
    278,639.45x = 384,640.16 × 188,118.03
  4. Step 4: Simplify right side
    278,639.45x = 72,357,748,217.49
  5. Step 5: Solve for x
    x = 72,357,748,217.49/278,639.45
  6. Step 6: Final answer
    x = 259,682.35

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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.