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Finding the Fourth Proportional to 280,198.80, 392,803.20 and 280,198.80

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Solution

The fourth proportional to 280,198.80, 392,803.20 and 280,198.80 is: 392,803.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,198.80 : 392,803.20 = 280,198.80 : x
  2. Step 2: Convert to fraction form
    280,198.80/392,803.20 = 280,198.80/x
  3. Step 3: Cross multiply
    280,198.80x = 392,803.20 × 280,198.80
  4. Step 4: Simplify right side
    280,198.80x = 110,062,985,276.16
  5. Step 5: Solve for x
    x = 110,062,985,276.16/280,198.80
  6. Step 6: Final answer
    x = 392,803.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.