Home / 678,823.20-1,018,234.80-205,532.10

Finding the Fourth Proportional to 678,823.20, 1,018,234.80 and 205,532.10

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Solution

The fourth proportional to 678,823.20, 1,018,234.80 and 205,532.10 is: 308,298.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,823.20 : 1,018,234.80 = 205,532.10 : x
  2. Step 2: Convert to fraction form
    678,823.20/1,018,234.80 = 205,532.10/x
  3. Step 3: Cross multiply
    678,823.20x = 1,018,234.80 × 205,532.10
  4. Step 4: Simplify right side
    678,823.20x = 209,279,936,737.08
  5. Step 5: Solve for x
    x = 209,279,936,737.08/678,823.20
  6. Step 6: Final answer
    x = 308,298.15

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Double scale
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Similar ratio
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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.