Home / 3,129.30-4,317.08-1,802.21

Finding the Fourth Proportional to 3,129.30, 4,317.08 and 1,802.21

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Solution

The fourth proportional to 3,129.30, 4,317.08 and 1,802.21 is: 2,486.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.30 : 4,317.08 = 1,802.21 : x
  2. Step 2: Convert to fraction form
    3,129.30/4,317.08 = 1,802.21/x
  3. Step 3: Cross multiply
    3,129.30x = 4,317.08 × 1,802.21
  4. Step 4: Simplify right side
    3,129.30x = 7,780,284.75
  5. Step 5: Solve for x
    x = 7,780,284.75/3,129.30
  6. Step 6: Final answer
    x = 2,486.27

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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.