Home / 278,639.55-384,640.28-188,118.12

Finding the Fourth Proportional to 278,639.55, 384,640.28 and 188,118.12

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Solution

The fourth proportional to 278,639.55, 384,640.28 and 188,118.12 is: 259,682.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,639.55 : 384,640.28 = 188,118.12 : x
  2. Step 2: Convert to fraction form
    278,639.55/384,640.28 = 188,118.12/x
  3. Step 3: Cross multiply
    278,639.55x = 384,640.28 × 188,118.12
  4. Step 4: Simplify right side
    278,639.55x = 72,357,805,409.28
  5. Step 5: Solve for x
    x = 72,357,805,409.28/278,639.55
  6. Step 6: Final answer
    x = 259,682.47

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1.5x scale

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.