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Finding the Fourth Proportional to 1,660.23, 2,491.89 and 839.08

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Solution

The fourth proportional to 1,660.23, 2,491.89 and 839.08 is: 1,259.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.23 : 2,491.89 = 839.08 : x
  2. Step 2: Convert to fraction form
    1,660.23/2,491.89 = 839.08/x
  3. Step 3: Cross multiply
    1,660.23x = 2,491.89 × 839.08
  4. Step 4: Simplify right side
    1,660.23x = 2,090,895.03
  5. Step 5: Solve for x
    x = 2,090,895.03/1,660.23
  6. Step 6: Final answer
    x = 1,259.40

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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.