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Finding the Fourth Proportional to 2,653.87, 3,979.92 and 898.40

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Solution

The fourth proportional to 2,653.87, 3,979.92 and 898.40 is: 1,347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,653.87 : 3,979.92 = 898.40 : x
  2. Step 2: Convert to fraction form
    2,653.87/3,979.92 = 898.40/x
  3. Step 3: Cross multiply
    2,653.87x = 3,979.92 × 898.40
  4. Step 4: Simplify right side
    2,653.87x = 3,575,540.23
  5. Step 5: Solve for x
    x = 3,575,540.23/2,653.87
  6. Step 6: Final answer
    x = 1,347.30

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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.