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Finding the Fourth Proportional to 587.38, 810.56 and 325.40

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Solution

The fourth proportional to 587.38, 810.56 and 325.40 is: 449.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.38 : 810.56 = 325.40 : x
  2. Step 2: Convert to fraction form
    587.38/810.56 = 325.40/x
  3. Step 3: Cross multiply
    587.38x = 810.56 × 325.40
  4. Step 4: Simplify right side
    587.38x = 263,756.22
  5. Step 5: Solve for x
    x = 263,756.22/587.38
  6. Step 6: Final answer
    x = 449.04

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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.