Home / 2,629.52-3,943.67-780.19

Finding the Fourth Proportional to 2,629.52, 3,943.67 and 780.19

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Solution

The fourth proportional to 2,629.52, 3,943.67 and 780.19 is: 1,170.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.52 : 3,943.67 = 780.19 : x
  2. Step 2: Convert to fraction form
    2,629.52/3,943.67 = 780.19/x
  3. Step 3: Cross multiply
    2,629.52x = 3,943.67 × 780.19
  4. Step 4: Simplify right side
    2,629.52x = 3,076,811.90
  5. Step 5: Solve for x
    x = 3,076,811.90/2,629.52
  6. Step 6: Final answer
    x = 1,170.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.