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Finding the Fourth Proportional to 1,854.79, 2,781.72 and 538.54

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Solution

The fourth proportional to 1,854.79, 2,781.72 and 538.54 is: 807.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,854.79 : 2,781.72 = 538.54 : x
  2. Step 2: Convert to fraction form
    1,854.79/2,781.72 = 538.54/x
  3. Step 3: Cross multiply
    1,854.79x = 2,781.72 × 538.54
  4. Step 4: Simplify right side
    1,854.79x = 1,498,067.49
  5. Step 5: Solve for x
    x = 1,498,067.49/1,854.79
  6. Step 6: Final answer
    x = 807.67

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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.