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Finding the Fourth Proportional to 398,383.87, 549,753.73 and 217,091.91

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Solution

The fourth proportional to 398,383.87, 549,753.73 and 217,091.91 is: 299,578.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,383.87 : 549,753.73 = 217,091.91 : x
  2. Step 2: Convert to fraction form
    398,383.87/549,753.73 = 217,091.91/x
  3. Step 3: Cross multiply
    398,383.87x = 549,753.73 × 217,091.91
  4. Step 4: Simplify right side
    398,383.87x = 119,347,087,696.04
  5. Step 5: Solve for x
    x = 119,347,087,696.04/398,383.87
  6. Step 6: Final answer
    x = 299,578.11

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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.