Home / 3,130.78-4,319.42-2,069.06

Finding the Fourth Proportional to 3,130.78, 4,319.42 and 2,069.06

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Solution

The fourth proportional to 3,130.78, 4,319.42 and 2,069.06 is: 2,854.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.78 : 4,319.42 = 2,069.06 : x
  2. Step 2: Convert to fraction form
    3,130.78/4,319.42 = 2,069.06/x
  3. Step 3: Cross multiply
    3,130.78x = 4,319.42 × 2,069.06
  4. Step 4: Simplify right side
    3,130.78x = 8,937,139.15
  5. Step 5: Solve for x
    x = 8,937,139.15/3,130.78
  6. Step 6: Final answer
    x = 2,854.60

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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.