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Finding the Fourth Proportional to 3,390.84, 4,679.34 and 1,898.76

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Solution

The fourth proportional to 3,390.84, 4,679.34 and 1,898.76 is: 2,620.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.84 : 4,679.34 = 1,898.76 : x
  2. Step 2: Convert to fraction form
    3,390.84/4,679.34 = 1,898.76/x
  3. Step 3: Cross multiply
    3,390.84x = 4,679.34 × 1,898.76
  4. Step 4: Simplify right side
    3,390.84x = 8,884,943.62
  5. Step 5: Solve for x
    x = 8,884,943.62/3,390.84
  6. Step 6: Final answer
    x = 2,620.28

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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.