Home / 1,438.32-2,158.32-1,347.20

Finding the Fourth Proportional to 1,438.32, 2,158.32 and 1,347.20

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Solution

The fourth proportional to 1,438.32, 2,158.32 and 1,347.20 is: 2,021.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.32 : 2,158.32 = 1,347.20 : x
  2. Step 2: Convert to fraction form
    1,438.32/2,158.32 = 1,347.20/x
  3. Step 3: Cross multiply
    1,438.32x = 2,158.32 × 1,347.20
  4. Step 4: Simplify right side
    1,438.32x = 2,907,688.70
  5. Step 5: Solve for x
    x = 2,907,688.70/1,438.32
  6. Step 6: Final answer
    x = 2,021.59

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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.