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Finding the Fourth Proportional to 521.62, 719.26 and 355.50

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Solution

The fourth proportional to 521.62, 719.26 and 355.50 is: 490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.62 : 719.26 = 355.50 : x
  2. Step 2: Convert to fraction form
    521.62/719.26 = 355.50/x
  3. Step 3: Cross multiply
    521.62x = 719.26 × 355.50
  4. Step 4: Simplify right side
    521.62x = 255,696.93
  5. Step 5: Solve for x
    x = 255,696.93/521.62
  6. Step 6: Final answer
    x = 490.20

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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.