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Finding the Fourth Proportional to 818.87, 1,228.50 and 332.06

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Solution

The fourth proportional to 818.87, 1,228.50 and 332.06 is: 498.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.87 : 1,228.50 = 332.06 : x
  2. Step 2: Convert to fraction form
    818.87/1,228.50 = 332.06/x
  3. Step 3: Cross multiply
    818.87x = 1,228.50 × 332.06
  4. Step 4: Simplify right side
    818.87x = 407,929.57
  5. Step 5: Solve for x
    x = 407,929.57/818.87
  6. Step 6: Final answer
    x = 498.16

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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.