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Finding the Fourth Proportional to 443.93, 612.51 and 355.59

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Solution

The fourth proportional to 443.93, 612.51 and 355.59 is: 490.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.93 : 612.51 = 355.59 : x
  2. Step 2: Convert to fraction form
    443.93/612.51 = 355.59/x
  3. Step 3: Cross multiply
    443.93x = 612.51 × 355.59
  4. Step 4: Simplify right side
    443.93x = 217,800.65
  5. Step 5: Solve for x
    x = 217,800.65/443.93
  6. Step 6: Final answer
    x = 490.62

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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.