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Finding the Fourth Proportional to 521.36, 720.36 and 437.24

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Solution

The fourth proportional to 521.36, 720.36 and 437.24 is: 604.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.36 : 720.36 = 437.24 : x
  2. Step 2: Convert to fraction form
    521.36/720.36 = 437.24/x
  3. Step 3: Cross multiply
    521.36x = 720.36 × 437.24
  4. Step 4: Simplify right side
    521.36x = 314,970.21
  5. Step 5: Solve for x
    x = 314,970.21/521.36
  6. Step 6: Final answer
    x = 604.13

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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.