Home / 3,115.90-4,299.88-1,699.59

Finding the Fourth Proportional to 3,115.90, 4,299.88 and 1,699.59

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Solution

The fourth proportional to 3,115.90, 4,299.88 and 1,699.59 is: 2,345.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.90 : 4,299.88 = 1,699.59 : x
  2. Step 2: Convert to fraction form
    3,115.90/4,299.88 = 1,699.59/x
  3. Step 3: Cross multiply
    3,115.90x = 4,299.88 × 1,699.59
  4. Step 4: Simplify right side
    3,115.90x = 7,308,033.05
  5. Step 5: Solve for x
    x = 7,308,033.05/3,115.90
  6. Step 6: Final answer
    x = 2,345.40

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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.