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Finding the Fourth Proportional to 1,628.60, 2,247.37 and 956.31

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Solution

The fourth proportional to 1,628.60, 2,247.37 and 956.31 is: 1,319.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.60 : 2,247.37 = 956.31 : x
  2. Step 2: Convert to fraction form
    1,628.60/2,247.37 = 956.31/x
  3. Step 3: Cross multiply
    1,628.60x = 2,247.37 × 956.31
  4. Step 4: Simplify right side
    1,628.60x = 2,149,185.39
  5. Step 5: Solve for x
    x = 2,149,185.39/1,628.60
  6. Step 6: Final answer
    x = 1,319.65

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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.