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Finding the Fourth Proportional to 5,805.72, 8,707.68 and 1,909.80

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Solution

The fourth proportional to 5,805.72, 8,707.68 and 1,909.80 is: 2,864.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,805.72 : 8,707.68 = 1,909.80 : x
  2. Step 2: Convert to fraction form
    5,805.72/8,707.68 = 1,909.80/x
  3. Step 3: Cross multiply
    5,805.72x = 8,707.68 × 1,909.80
  4. Step 4: Simplify right side
    5,805.72x = 16,629,927.26
  5. Step 5: Solve for x
    x = 16,629,927.26/5,805.72
  6. Step 6: Final answer
    x = 2,864.40

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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.