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Finding the Fourth Proportional to 1,615.70, 2,230.74 and 1,242.02

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Solution

The fourth proportional to 1,615.70, 2,230.74 and 1,242.02 is: 1,714.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.70 : 2,230.74 = 1,242.02 : x
  2. Step 2: Convert to fraction form
    1,615.70/2,230.74 = 1,242.02/x
  3. Step 3: Cross multiply
    1,615.70x = 2,230.74 × 1,242.02
  4. Step 4: Simplify right side
    1,615.70x = 2,770,629.27
  5. Step 5: Solve for x
    x = 2,770,629.27/1,615.70
  6. Step 6: Final answer
    x = 1,714.81

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1.5x scale

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.