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Finding the Fourth Proportional to 581.91, 871.72 and 386.33

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Solution

The fourth proportional to 581.91, 871.72 and 386.33 is: 578.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.91 : 871.72 = 386.33 : x
  2. Step 2: Convert to fraction form
    581.91/871.72 = 386.33/x
  3. Step 3: Cross multiply
    581.91x = 871.72 × 386.33
  4. Step 4: Simplify right side
    581.91x = 336,775.11
  5. Step 5: Solve for x
    x = 336,775.11/581.91
  6. Step 6: Final answer
    x = 578.74

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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.