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Finding the Fourth Proportional to 521.58, 720.32 and 451.30

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Solution

The fourth proportional to 521.58, 720.32 and 451.30 is: 623.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.58 : 720.32 = 451.30 : x
  2. Step 2: Convert to fraction form
    521.58/720.32 = 451.30/x
  3. Step 3: Cross multiply
    521.58x = 720.32 × 451.30
  4. Step 4: Simplify right side
    521.58x = 325,078.16
  5. Step 5: Solve for x
    x = 325,078.16/521.58
  6. Step 6: Final answer
    x = 623.26

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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.