Home / 3,129.79-4,319.64-1,804.26

Finding the Fourth Proportional to 3,129.79, 4,319.64 and 1,804.26

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Solution

The fourth proportional to 3,129.79, 4,319.64 and 1,804.26 is: 2,490.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.79 : 4,319.64 = 1,804.26 : x
  2. Step 2: Convert to fraction form
    3,129.79/4,319.64 = 1,804.26/x
  3. Step 3: Cross multiply
    3,129.79x = 4,319.64 × 1,804.26
  4. Step 4: Simplify right side
    3,129.79x = 7,793,744.65
  5. Step 5: Solve for x
    x = 7,793,744.65/3,129.79
  6. Step 6: Final answer
    x = 2,490.19

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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.