Home / 678,154.20-1,017,231.30-394,330.20

Finding the Fourth Proportional to 678,154.20, 1,017,231.30 and 394,330.20

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Solution

The fourth proportional to 678,154.20, 1,017,231.30 and 394,330.20 is: 591,495.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,154.20 : 1,017,231.30 = 394,330.20 : x
  2. Step 2: Convert to fraction form
    678,154.20/1,017,231.30 = 394,330.20/x
  3. Step 3: Cross multiply
    678,154.20x = 1,017,231.30 × 394,330.20
  4. Step 4: Simplify right side
    678,154.20x = 401,125,021,975.26
  5. Step 5: Solve for x
    x = 401,125,021,975.26/678,154.20
  6. Step 6: Final answer
    x = 591,495.30

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Half scale
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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.