Home / 3,128.22-4,317.45-1,801.70

Finding the Fourth Proportional to 3,128.22, 4,317.45 and 1,801.70

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Solution

The fourth proportional to 3,128.22, 4,317.45 and 1,801.70 is: 2,486.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.22 : 4,317.45 = 1,801.70 : x
  2. Step 2: Convert to fraction form
    3,128.22/4,317.45 = 1,801.70/x
  3. Step 3: Cross multiply
    3,128.22x = 4,317.45 × 1,801.70
  4. Step 4: Simplify right side
    3,128.22x = 7,778,749.67
  5. Step 5: Solve for x
    x = 7,778,749.67/3,128.22
  6. Step 6: Final answer
    x = 2,486.64

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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.