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Finding the Fourth Proportional to 678,658.60, 1,017,339.90 and 252,080.20

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Solution

The fourth proportional to 678,658.60, 1,017,339.90 and 252,080.20 is: 377,879.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,658.60 : 1,017,339.90 = 252,080.20 : x
  2. Step 2: Convert to fraction form
    678,658.60/1,017,339.90 = 252,080.20/x
  3. Step 3: Cross multiply
    678,658.60x = 1,017,339.90 × 252,080.20
  4. Step 4: Simplify right side
    678,658.60x = 256,451,245,459.98
  5. Step 5: Solve for x
    x = 256,451,245,459.98/678,658.60
  6. Step 6: Final answer
    x = 377,879.61

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Double scale
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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.