Home / 3,620.10-5,430.80-1,672.50

Finding the Fourth Proportional to 3,620.10, 5,430.80 and 1,672.50

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Solution

The fourth proportional to 3,620.10, 5,430.80 and 1,672.50 is: 2,509.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.10 : 5,430.80 = 1,672.50 : x
  2. Step 2: Convert to fraction form
    3,620.10/5,430.80 = 1,672.50/x
  3. Step 3: Cross multiply
    3,620.10x = 5,430.80 × 1,672.50
  4. Step 4: Simplify right side
    3,620.10x = 9,083,013
  5. Step 5: Solve for x
    x = 9,083,013/3,620.10
  6. Step 6: Final answer
    x = 2,509.05

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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.