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Finding the Fourth Proportional to 1,390.75, 2,086.26 and 466.54

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Solution

The fourth proportional to 1,390.75, 2,086.26 and 466.54 is: 699.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.75 : 2,086.26 = 466.54 : x
  2. Step 2: Convert to fraction form
    1,390.75/2,086.26 = 466.54/x
  3. Step 3: Cross multiply
    1,390.75x = 2,086.26 × 466.54
  4. Step 4: Simplify right side
    1,390.75x = 973,323.74
  5. Step 5: Solve for x
    x = 973,323.74/1,390.75
  6. Step 6: Final answer
    x = 699.86

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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.