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Finding the Fourth Proportional to 3,389.92, 4,678.20 and 1,898.08

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Solution

The fourth proportional to 3,389.92, 4,678.20 and 1,898.08 is: 2,619.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.92 : 4,678.20 = 1,898.08 : x
  2. Step 2: Convert to fraction form
    3,389.92/4,678.20 = 1,898.08/x
  3. Step 3: Cross multiply
    3,389.92x = 4,678.20 × 1,898.08
  4. Step 4: Simplify right side
    3,389.92x = 8,879,597.86
  5. Step 5: Solve for x
    x = 8,879,597.86/3,389.92
  6. Step 6: Final answer
    x = 2,619.41

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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.