Home / 1,411.20-1,958.40-1,353.60

Finding the Fourth Proportional to 1,411.20, 1,958.40 and 1,353.60

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Solution

The fourth proportional to 1,411.20, 1,958.40 and 1,353.60 is: 1,878.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.20 : 1,958.40 = 1,353.60 : x
  2. Step 2: Convert to fraction form
    1,411.20/1,958.40 = 1,353.60/x
  3. Step 3: Cross multiply
    1,411.20x = 1,958.40 × 1,353.60
  4. Step 4: Simplify right side
    1,411.20x = 2,650,890.24
  5. Step 5: Solve for x
    x = 2,650,890.24/1,411.20
  6. Step 6: Final answer
    x = 1,878.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.