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Finding the Fourth Proportional to 521.64, 719.86 and 335.20

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Solution

The fourth proportional to 521.64, 719.86 and 335.20 is: 462.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.64 : 719.86 = 335.20 : x
  2. Step 2: Convert to fraction form
    521.64/719.86 = 335.20/x
  3. Step 3: Cross multiply
    521.64x = 719.86 × 335.20
  4. Step 4: Simplify right side
    521.64x = 241,299.71
  5. Step 5: Solve for x
    x = 241,299.71/521.64
  6. Step 6: Final answer
    x = 462.58

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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.