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Finding the Fourth Proportional to 1,879.79, 2,818.82 and 545.28

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Solution

The fourth proportional to 1,879.79, 2,818.82 and 545.28 is: 817.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.79 : 2,818.82 = 545.28 : x
  2. Step 2: Convert to fraction form
    1,879.79/2,818.82 = 545.28/x
  3. Step 3: Cross multiply
    1,879.79x = 2,818.82 × 545.28
  4. Step 4: Simplify right side
    1,879.79x = 1,537,046.17
  5. Step 5: Solve for x
    x = 1,537,046.17/1,879.79
  6. Step 6: Final answer
    x = 817.67

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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.