Home / 1,340.87-2,011.59-416.45

Finding the Fourth Proportional to 1,340.87, 2,011.59 and 416.45

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Solution

The fourth proportional to 1,340.87, 2,011.59 and 416.45 is: 624.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.87 : 2,011.59 = 416.45 : x
  2. Step 2: Convert to fraction form
    1,340.87/2,011.59 = 416.45/x
  3. Step 3: Cross multiply
    1,340.87x = 2,011.59 × 416.45
  4. Step 4: Simplify right side
    1,340.87x = 837,716.60
  5. Step 5: Solve for x
    x = 837,716.60/1,340.87
  6. Step 6: Final answer
    x = 624.76

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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.