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Finding the Fourth Proportional to 3,389.92, 5,071.92 and 1,929.76

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Solution

The fourth proportional to 3,389.92, 5,071.92 and 1,929.76 is: 2,887.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.92 : 5,071.92 = 1,929.76 : x
  2. Step 2: Convert to fraction form
    3,389.92/5,071.92 = 1,929.76/x
  3. Step 3: Cross multiply
    3,389.92x = 5,071.92 × 1,929.76
  4. Step 4: Simplify right side
    3,389.92x = 9,787,588.34
  5. Step 5: Solve for x
    x = 9,787,588.34/3,389.92
  6. Step 6: Final answer
    x = 2,887.26

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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.