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Finding the Fourth Proportional to 1,228.29, 1,841.64 and 611.67

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Solution

The fourth proportional to 1,228.29, 1,841.64 and 611.67 is: 917.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.29 : 1,841.64 = 611.67 : x
  2. Step 2: Convert to fraction form
    1,228.29/1,841.64 = 611.67/x
  3. Step 3: Cross multiply
    1,228.29x = 1,841.64 × 611.67
  4. Step 4: Simplify right side
    1,228.29x = 1,126,475.94
  5. Step 5: Solve for x
    x = 1,126,475.94/1,228.29
  6. Step 6: Final answer
    x = 917.11

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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.