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Finding the Fourth Proportional to 587.21, 809.93 and 400.62

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Solution

The fourth proportional to 587.21, 809.93 and 400.62 is: 552.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.21 : 809.93 = 400.62 : x
  2. Step 2: Convert to fraction form
    587.21/809.93 = 400.62/x
  3. Step 3: Cross multiply
    587.21x = 809.93 × 400.62
  4. Step 4: Simplify right side
    587.21x = 324,474.16
  5. Step 5: Solve for x
    x = 324,474.16/587.21
  6. Step 6: Final answer
    x = 552.57

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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.