Home / 678,661.20-1,017,991.80-257,914.80

Finding the Fourth Proportional to 678,661.20, 1,017,991.80 and 257,914.80

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Solution

The fourth proportional to 678,661.20, 1,017,991.80 and 257,914.80 is: 386,872.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,661.20 : 1,017,991.80 = 257,914.80 : x
  2. Step 2: Convert to fraction form
    678,661.20/1,017,991.80 = 257,914.80/x
  3. Step 3: Cross multiply
    678,661.20x = 1,017,991.80 × 257,914.80
  4. Step 4: Simplify right side
    678,661.20x = 262,555,151,498.64
  5. Step 5: Solve for x
    x = 262,555,151,498.64/678,661.20
  6. Step 6: Final answer
    x = 386,872.20

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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.