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Finding the Fourth Proportional to 587.98, 811.40 and 325.98

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Solution

The fourth proportional to 587.98, 811.40 and 325.98 is: 449.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.98 : 811.40 = 325.98 : x
  2. Step 2: Convert to fraction form
    587.98/811.40 = 325.98/x
  3. Step 3: Cross multiply
    587.98x = 811.40 × 325.98
  4. Step 4: Simplify right side
    587.98x = 264,500.17
  5. Step 5: Solve for x
    x = 264,500.17/587.98
  6. Step 6: Final answer
    x = 449.85

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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.