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Finding the Fourth Proportional to 398,221.15, 549,544.95 and 219,373.15

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Solution

The fourth proportional to 398,221.15, 549,544.95 and 219,373.15 is: 302,734.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,221.15 : 549,544.95 = 219,373.15 : x
  2. Step 2: Convert to fraction form
    398,221.15/549,544.95 = 219,373.15/x
  3. Step 3: Cross multiply
    398,221.15x = 549,544.95 × 219,373.15
  4. Step 4: Simplify right side
    398,221.15x = 120,555,405,651.23
  5. Step 5: Solve for x
    x = 120,555,405,651.23/398,221.15
  6. Step 6: Final answer
    x = 302,734.81

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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.