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Finding the Fourth Proportional to 3,898.71, 5,384.79 and 3,104.70

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Solution

The fourth proportional to 3,898.71, 5,384.79 and 3,104.70 is: 4,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.71 : 5,384.79 = 3,104.70 : x
  2. Step 2: Convert to fraction form
    3,898.71/5,384.79 = 3,104.70/x
  3. Step 3: Cross multiply
    3,898.71x = 5,384.79 × 3,104.70
  4. Step 4: Simplify right side
    3,898.71x = 16,718,157.51
  5. Step 5: Solve for x
    x = 16,718,157.51/3,898.71
  6. Step 6: Final answer
    x = 4,288.13

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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.