Home / 2,281.36-3,421.80-638.08

Finding the Fourth Proportional to 2,281.36, 3,421.80 and 638.08

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Solution

The fourth proportional to 2,281.36, 3,421.80 and 638.08 is: 957.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,281.36 : 3,421.80 = 638.08 : x
  2. Step 2: Convert to fraction form
    2,281.36/3,421.80 = 638.08/x
  3. Step 3: Cross multiply
    2,281.36x = 3,421.80 × 638.08
  4. Step 4: Simplify right side
    2,281.36x = 2,183,382.14
  5. Step 5: Solve for x
    x = 2,183,382.14/2,281.36
  6. Step 6: Final answer
    x = 957.05

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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.