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Finding the Fourth Proportional to 1,357.70, 1,873.61 and 736.70

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Solution

The fourth proportional to 1,357.70, 1,873.61 and 736.70 is: 1,016.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.70 : 1,873.61 = 736.70 : x
  2. Step 2: Convert to fraction form
    1,357.70/1,873.61 = 736.70/x
  3. Step 3: Cross multiply
    1,357.70x = 1,873.61 × 736.70
  4. Step 4: Simplify right side
    1,357.70x = 1,380,280.96
  5. Step 5: Solve for x
    x = 1,380,280.96/1,357.70
  6. Step 6: Final answer
    x = 1,016.64

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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.