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Finding the Fourth Proportional to 3,390.88, 4,679.36 and 1,898.80

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Solution

The fourth proportional to 3,390.88, 4,679.36 and 1,898.80 is: 2,620.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.88 : 4,679.36 = 1,898.80 : x
  2. Step 2: Convert to fraction form
    3,390.88/4,679.36 = 1,898.80/x
  3. Step 3: Cross multiply
    3,390.88x = 4,679.36 × 1,898.80
  4. Step 4: Simplify right side
    3,390.88x = 8,885,168.77
  5. Step 5: Solve for x
    x = 8,885,168.77/3,390.88
  6. Step 6: Final answer
    x = 2,620.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.