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Finding the Fourth Proportional to 398,220.82, 549,538.37 and 216,934.92

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Solution

The fourth proportional to 398,220.82, 549,538.37 and 216,934.92 is: 299,366.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,220.82 : 549,538.37 = 216,934.92 : x
  2. Step 2: Convert to fraction form
    398,220.82/549,538.37 = 216,934.92/x
  3. Step 3: Cross multiply
    398,220.82x = 549,538.37 × 216,934.92
  4. Step 4: Simplify right side
    398,220.82x = 119,214,062,332.88
  5. Step 5: Solve for x
    x = 119,214,062,332.88/398,220.82
  6. Step 6: Final answer
    x = 299,366.72

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Double scale
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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.