Home / 3,129.78-4,319.06-1,713.45

Finding the Fourth Proportional to 3,129.78, 4,319.06 and 1,713.45

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Solution

The fourth proportional to 3,129.78, 4,319.06 and 1,713.45 is: 2,364.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.78 : 4,319.06 = 1,713.45 : x
  2. Step 2: Convert to fraction form
    3,129.78/4,319.06 = 1,713.45/x
  3. Step 3: Cross multiply
    3,129.78x = 4,319.06 × 1,713.45
  4. Step 4: Simplify right side
    3,129.78x = 7,400,493.36
  5. Step 5: Solve for x
    x = 7,400,493.36/3,129.78
  6. Step 6: Final answer
    x = 2,364.54

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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.