Home / 678,140.20-1,017,210.30-394,316.20

Finding the Fourth Proportional to 678,140.20, 1,017,210.30 and 394,316.20

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Solution

The fourth proportional to 678,140.20, 1,017,210.30 and 394,316.20 is: 591,474.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,140.20 : 1,017,210.30 = 394,316.20 : x
  2. Step 2: Convert to fraction form
    678,140.20/1,017,210.30 = 394,316.20/x
  3. Step 3: Cross multiply
    678,140.20x = 1,017,210.30 × 394,316.20
  4. Step 4: Simplify right side
    678,140.20x = 401,102,500,096.86
  5. Step 5: Solve for x
    x = 401,102,500,096.86/678,140.20
  6. Step 6: Final answer
    x = 591,474.30

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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.