Home / 5,309.79-7,328.40-3,071.28

Finding the Fourth Proportional to 5,309.79, 7,328.40 and 3,071.28

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Solution

The fourth proportional to 5,309.79, 7,328.40 and 3,071.28 is: 4,238.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,309.79 : 7,328.40 = 3,071.28 : x
  2. Step 2: Convert to fraction form
    5,309.79/7,328.40 = 3,071.28/x
  3. Step 3: Cross multiply
    5,309.79x = 7,328.40 × 3,071.28
  4. Step 4: Simplify right side
    5,309.79x = 22,507,568.35
  5. Step 5: Solve for x
    x = 22,507,568.35/5,309.79
  6. Step 6: Final answer
    x = 4,238.88

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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.