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Finding the Fourth Proportional to 355,397.73, 490,502.30 and 217,658.85

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Solution

The fourth proportional to 355,397.73, 490,502.30 and 217,658.85 is: 300,401.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,397.73 : 490,502.30 = 217,658.85 : x
  2. Step 2: Convert to fraction form
    355,397.73/490,502.30 = 217,658.85/x
  3. Step 3: Cross multiply
    355,397.73x = 490,502.30 × 217,658.85
  4. Step 4: Simplify right side
    355,397.73x = 106,762,165,452.06
  5. Step 5: Solve for x
    x = 106,762,165,452.06/355,397.73
  6. Step 6: Final answer
    x = 300,401.93

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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.