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Finding the Fourth Proportional to 581.40, 871.56 and 479.52

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Solution

The fourth proportional to 581.40, 871.56 and 479.52 is: 718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.40 : 871.56 = 479.52 : x
  2. Step 2: Convert to fraction form
    581.40/871.56 = 479.52/x
  3. Step 3: Cross multiply
    581.40x = 871.56 × 479.52
  4. Step 4: Simplify right side
    581.40x = 417,930.45
  5. Step 5: Solve for x
    x = 417,930.45/581.40
  6. Step 6: Final answer
    x = 718.83

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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.