Home / 1,615.80-2,230.86-1,242.09

Finding the Fourth Proportional to 1,615.80, 2,230.86 and 1,242.09

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Solution

The fourth proportional to 1,615.80, 2,230.86 and 1,242.09 is: 1,714.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.80 : 2,230.86 = 1,242.09 : x
  2. Step 2: Convert to fraction form
    1,615.80/2,230.86 = 1,242.09/x
  3. Step 3: Cross multiply
    1,615.80x = 2,230.86 × 1,242.09
  4. Step 4: Simplify right side
    1,615.80x = 2,770,928.90
  5. Step 5: Solve for x
    x = 2,770,928.90/1,615.80
  6. Step 6: Final answer
    x = 1,714.90

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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.