Home / 2,505.85-3,458.05-1,386.79

Finding the Fourth Proportional to 2,505.85, 3,458.05 and 1,386.79

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Solution

The fourth proportional to 2,505.85, 3,458.05 and 1,386.79 is: 1,913.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.85 : 3,458.05 = 1,386.79 : x
  2. Step 2: Convert to fraction form
    2,505.85/3,458.05 = 1,386.79/x
  3. Step 3: Cross multiply
    2,505.85x = 3,458.05 × 1,386.79
  4. Step 4: Simplify right side
    2,505.85x = 4,795,589.16
  5. Step 5: Solve for x
    x = 4,795,589.16/2,505.85
  6. Step 6: Final answer
    x = 1,913.76

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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.