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Finding the Fourth Proportional to 3,889.76, 5,828.74 and 3,160.76

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Solution

The fourth proportional to 3,889.76, 5,828.74 and 3,160.76 is: 4,736.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.76 : 5,828.74 = 3,160.76 : x
  2. Step 2: Convert to fraction form
    3,889.76/5,828.74 = 3,160.76/x
  3. Step 3: Cross multiply
    3,889.76x = 5,828.74 × 3,160.76
  4. Step 4: Simplify right side
    3,889.76x = 18,423,248.24
  5. Step 5: Solve for x
    x = 18,423,248.24/3,889.76
  6. Step 6: Final answer
    x = 4,736.35

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1.5x scale

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.