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Finding the Fourth Proportional to 303,986.60, 455,979.90 and 279,492.20

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Solution

The fourth proportional to 303,986.60, 455,979.90 and 279,492.20 is: 419,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,986.60 : 455,979.90 = 279,492.20 : x
  2. Step 2: Convert to fraction form
    303,986.60/455,979.90 = 279,492.20/x
  3. Step 3: Cross multiply
    303,986.60x = 455,979.90 × 279,492.20
  4. Step 4: Simplify right side
    303,986.60x = 127,442,825,406.78
  5. Step 5: Solve for x
    x = 127,442,825,406.78/303,986.60
  6. Step 6: Final answer
    x = 419,238.30

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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.