Home / 2,108.40-3,157.20-1,557.60

Finding the Fourth Proportional to 2,108.40, 3,157.20 and 1,557.60

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Solution

The fourth proportional to 2,108.40, 3,157.20 and 1,557.60 is: 2,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.40 : 3,157.20 = 1,557.60 : x
  2. Step 2: Convert to fraction form
    2,108.40/3,157.20 = 1,557.60/x
  3. Step 3: Cross multiply
    2,108.40x = 3,157.20 × 1,557.60
  4. Step 4: Simplify right side
    2,108.40x = 4,917,654.72
  5. Step 5: Solve for x
    x = 4,917,654.72/2,108.40
  6. Step 6: Final answer
    x = 2,332.41

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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.