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Finding the Fourth Proportional to 398,485.98, 549,910.22 and 217,198.26

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Solution

The fourth proportional to 398,485.98, 549,910.22 and 217,198.26 is: 299,733.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,485.98 : 549,910.22 = 217,198.26 : x
  2. Step 2: Convert to fraction form
    398,485.98/549,910.22 = 217,198.26/x
  3. Step 3: Cross multiply
    398,485.98x = 549,910.22 × 217,198.26
  4. Step 4: Simplify right side
    398,485.98x = 119,439,541,854.23
  5. Step 5: Solve for x
    x = 119,439,541,854.23/398,485.98
  6. Step 6: Final answer
    x = 299,733.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.