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Finding the Fourth Proportional to 3,411.70, 5,117.43 and 1,359.70

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Solution

The fourth proportional to 3,411.70, 5,117.43 and 1,359.70 is: 2,039.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,411.70 : 5,117.43 = 1,359.70 : x
  2. Step 2: Convert to fraction form
    3,411.70/5,117.43 = 1,359.70/x
  3. Step 3: Cross multiply
    3,411.70x = 5,117.43 × 1,359.70
  4. Step 4: Simplify right side
    3,411.70x = 6,958,169.57
  5. Step 5: Solve for x
    x = 6,958,169.57/3,411.70
  6. Step 6: Final answer
    x = 2,039.50

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Find fourth proportional to 3,412.70, 5,118.93 and 1,360.70
Similar ratio
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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.