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Finding the Fourth Proportional to 851.92, 1,175.58 and 478.83

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Solution

The fourth proportional to 851.92, 1,175.58 and 478.83 is: 660.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.92 : 1,175.58 = 478.83 : x
  2. Step 2: Convert to fraction form
    851.92/1,175.58 = 478.83/x
  3. Step 3: Cross multiply
    851.92x = 1,175.58 × 478.83
  4. Step 4: Simplify right side
    851.92x = 562,898.56
  5. Step 5: Solve for x
    x = 562,898.56/851.92
  6. Step 6: Final answer
    x = 660.74

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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.