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Finding the Fourth Proportional to 278,080.56, 416,798.46 and 128,005.92

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Solution

The fourth proportional to 278,080.56, 416,798.46 and 128,005.92 is: 191,860.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,080.56 : 416,798.46 = 128,005.92 : x
  2. Step 2: Convert to fraction form
    278,080.56/416,798.46 = 128,005.92/x
  3. Step 3: Cross multiply
    278,080.56x = 416,798.46 × 128,005.92
  4. Step 4: Simplify right side
    278,080.56x = 53,352,670,326.88
  5. Step 5: Solve for x
    x = 53,352,670,326.88/278,080.56
  6. Step 6: Final answer
    x = 191,860.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.