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Finding the Fourth Proportional to 3,405.69, 4,699.59 and 1,913.56

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Solution

The fourth proportional to 3,405.69, 4,699.59 and 1,913.56 is: 2,640.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.69 : 4,699.59 = 1,913.56 : x
  2. Step 2: Convert to fraction form
    3,405.69/4,699.59 = 1,913.56/x
  3. Step 3: Cross multiply
    3,405.69x = 4,699.59 × 1,913.56
  4. Step 4: Simplify right side
    3,405.69x = 8,992,947.44
  5. Step 5: Solve for x
    x = 8,992,947.44/3,405.69
  6. Step 6: Final answer
    x = 2,640.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.