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Finding the Fourth Proportional to 398,410.20, 549,806.20 and 217,122.20

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Solution

The fourth proportional to 398,410.20, 549,806.20 and 217,122.20 is: 299,628.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,410.20 : 549,806.20 = 217,122.20 : x
  2. Step 2: Convert to fraction form
    398,410.20/549,806.20 = 217,122.20/x
  3. Step 3: Cross multiply
    398,410.20x = 549,806.20 × 217,122.20
  4. Step 4: Simplify right side
    398,410.20x = 119,375,131,717.64
  5. Step 5: Solve for x
    x = 119,375,131,717.64/398,410.20
  6. Step 6: Final answer
    x = 299,628.70

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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.