Home / 3,585.36-5,378.40-1,638.48

Finding the Fourth Proportional to 3,585.36, 5,378.40 and 1,638.48

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Solution

The fourth proportional to 3,585.36, 5,378.40 and 1,638.48 is: 2,457.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,585.36 : 5,378.40 = 1,638.48 : x
  2. Step 2: Convert to fraction form
    3,585.36/5,378.40 = 1,638.48/x
  3. Step 3: Cross multiply
    3,585.36x = 5,378.40 × 1,638.48
  4. Step 4: Simplify right side
    3,585.36x = 8,812,400.83
  5. Step 5: Solve for x
    x = 8,812,400.83/3,585.36
  6. Step 6: Final answer
    x = 2,457.88

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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.