Home / 678,321.40-1,017,482.10-205,079.80

Finding the Fourth Proportional to 678,321.40, 1,017,482.10 and 205,079.80

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Solution

The fourth proportional to 678,321.40, 1,017,482.10 and 205,079.80 is: 307,619.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,321.40 : 1,017,482.10 = 205,079.80 : x
  2. Step 2: Convert to fraction form
    678,321.40/1,017,482.10 = 205,079.80/x
  3. Step 3: Cross multiply
    678,321.40x = 1,017,482.10 × 205,079.80
  4. Step 4: Simplify right side
    678,321.40x = 208,665,025,571.58
  5. Step 5: Solve for x
    x = 208,665,025,571.58/678,321.40
  6. Step 6: Final answer
    x = 307,619.70

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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.