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Finding the Fourth Proportional to 1,631.08, 2,448.15 and 809.74

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Solution

The fourth proportional to 1,631.08, 2,448.15 and 809.74 is: 1,215.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.08 : 2,448.15 = 809.74 : x
  2. Step 2: Convert to fraction form
    1,631.08/2,448.15 = 809.74/x
  3. Step 3: Cross multiply
    1,631.08x = 2,448.15 × 809.74
  4. Step 4: Simplify right side
    1,631.08x = 1,982,364.98
  5. Step 5: Solve for x
    x = 1,982,364.98/1,631.08
  6. Step 6: Final answer
    x = 1,215.37

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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.