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Finding the Fourth Proportional to 551.90, 828.25 and 479.81

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Solution

The fourth proportional to 551.90, 828.25 and 479.81 is: 720.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.90 : 828.25 = 479.81 : x
  2. Step 2: Convert to fraction form
    551.90/828.25 = 479.81/x
  3. Step 3: Cross multiply
    551.90x = 828.25 × 479.81
  4. Step 4: Simplify right side
    551.90x = 397,402.63
  5. Step 5: Solve for x
    x = 397,402.63/551.90
  6. Step 6: Final answer
    x = 720.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.