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Finding the Fourth Proportional to 1,257.06, 1,735.11 and 838.02

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Solution

The fourth proportional to 1,257.06, 1,735.11 and 838.02 is: 1,156.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.06 : 1,735.11 = 838.02 : x
  2. Step 2: Convert to fraction form
    1,257.06/1,735.11 = 838.02/x
  3. Step 3: Cross multiply
    1,257.06x = 1,735.11 × 838.02
  4. Step 4: Simplify right side
    1,257.06x = 1,454,056.88
  5. Step 5: Solve for x
    x = 1,454,056.88/1,257.06
  6. Step 6: Final answer
    x = 1,156.71

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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.