Home / 3,620.88-5,430.60-1,771.20

Finding the Fourth Proportional to 3,620.88, 5,430.60 and 1,771.20

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Solution

The fourth proportional to 3,620.88, 5,430.60 and 1,771.20 is: 2,656.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.88 : 5,430.60 = 1,771.20 : x
  2. Step 2: Convert to fraction form
    3,620.88/5,430.60 = 1,771.20/x
  3. Step 3: Cross multiply
    3,620.88x = 5,430.60 × 1,771.20
  4. Step 4: Simplify right side
    3,620.88x = 9,618,678.72
  5. Step 5: Solve for x
    x = 9,618,678.72/3,620.88
  6. Step 6: Final answer
    x = 2,656.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.