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Finding the Fourth Proportional to 398,998.80, 598,498.20 and 366,339.60

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Solution

The fourth proportional to 398,998.80, 598,498.20 and 366,339.60 is: 549,509.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,998.80 : 598,498.20 = 366,339.60 : x
  2. Step 2: Convert to fraction form
    398,998.80/598,498.20 = 366,339.60/x
  3. Step 3: Cross multiply
    398,998.80x = 598,498.20 × 366,339.60
  4. Step 4: Simplify right side
    398,998.80x = 219,253,591,188.72
  5. Step 5: Solve for x
    x = 219,253,591,188.72/398,998.80
  6. Step 6: Final answer
    x = 549,509.40

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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.