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Finding the Fourth Proportional to 355,636.90, 491,331.51 and 298,187.14

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Solution

The fourth proportional to 355,636.90, 491,331.51 and 298,187.14 is: 411,961.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,636.90 : 491,331.51 = 298,187.14 : x
  2. Step 2: Convert to fraction form
    355,636.90/491,331.51 = 298,187.14/x
  3. Step 3: Cross multiply
    355,636.90x = 491,331.51 × 298,187.14
  4. Step 4: Simplify right side
    355,636.90x = 146,508,737,758.78
  5. Step 5: Solve for x
    x = 146,508,737,758.78/355,636.90
  6. Step 6: Final answer
    x = 411,961.58

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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.