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Finding the Fourth Proportional to 3,505.87, 5,259.21 and 909.01

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Solution

The fourth proportional to 3,505.87, 5,259.21 and 909.01 is: 1,363.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,505.87 : 5,259.21 = 909.01 : x
  2. Step 2: Convert to fraction form
    3,505.87/5,259.21 = 909.01/x
  3. Step 3: Cross multiply
    3,505.87x = 5,259.21 × 909.01
  4. Step 4: Simplify right side
    3,505.87x = 4,780,674.48
  5. Step 5: Solve for x
    x = 4,780,674.48/3,505.87
  6. Step 6: Final answer
    x = 1,363.62

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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.