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Finding the Fourth Proportional to 662,141.20, 993,211.80 and 396,720.40

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Solution

The fourth proportional to 662,141.20, 993,211.80 and 396,720.40 is: 595,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,141.20 : 993,211.80 = 396,720.40 : x
  2. Step 2: Convert to fraction form
    662,141.20/993,211.80 = 396,720.40/x
  3. Step 3: Cross multiply
    662,141.20x = 993,211.80 × 396,720.40
  4. Step 4: Simplify right side
    662,141.20x = 394,027,382,580.72
  5. Step 5: Solve for x
    x = 394,027,382,580.72/662,141.20
  6. Step 6: Final answer
    x = 595,080.60

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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.