Home / 3,621.76-5,430.06-1,281.28

Finding the Fourth Proportional to 3,621.76, 5,430.06 and 1,281.28

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Solution

The fourth proportional to 3,621.76, 5,430.06 and 1,281.28 is: 1,921.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.76 : 5,430.06 = 1,281.28 : x
  2. Step 2: Convert to fraction form
    3,621.76/5,430.06 = 1,281.28/x
  3. Step 3: Cross multiply
    3,621.76x = 5,430.06 × 1,281.28
  4. Step 4: Simplify right side
    3,621.76x = 6,957,427.28
  5. Step 5: Solve for x
    x = 6,957,427.28/3,621.76
  6. Step 6: Final answer
    x = 1,921.01

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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.