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Finding the Fourth Proportional to 1,228.14, 1,840.14 and 788.31

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Solution

The fourth proportional to 1,228.14, 1,840.14 and 788.31 is: 1,181.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.14 : 1,840.14 = 788.31 : x
  2. Step 2: Convert to fraction form
    1,228.14/1,840.14 = 788.31/x
  3. Step 3: Cross multiply
    1,228.14x = 1,840.14 × 788.31
  4. Step 4: Simplify right side
    1,228.14x = 1,450,600.76
  5. Step 5: Solve for x
    x = 1,450,600.76/1,228.14
  6. Step 6: Final answer
    x = 1,181.14

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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.