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Finding the Fourth Proportional to 589.57, 882.78 and 487.30

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Solution

The fourth proportional to 589.57, 882.78 and 487.30 is: 729.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.57 : 882.78 = 487.30 : x
  2. Step 2: Convert to fraction form
    589.57/882.78 = 487.30/x
  3. Step 3: Cross multiply
    589.57x = 882.78 × 487.30
  4. Step 4: Simplify right side
    589.57x = 430,178.69
  5. Step 5: Solve for x
    x = 430,178.69/589.57
  6. Step 6: Final answer
    x = 729.65

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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.