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Finding the Fourth Proportional to 1,357.53, 1,873.29 and 768.11

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Solution

The fourth proportional to 1,357.53, 1,873.29 and 768.11 is: 1,059.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.53 : 1,873.29 = 768.11 : x
  2. Step 2: Convert to fraction form
    1,357.53/1,873.29 = 768.11/x
  3. Step 3: Cross multiply
    1,357.53x = 1,873.29 × 768.11
  4. Step 4: Simplify right side
    1,357.53x = 1,438,880.54
  5. Step 5: Solve for x
    x = 1,438,880.54/1,357.53
  6. Step 6: Final answer
    x = 1,059.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.