Home / 1,318.08-1,816.32-1,261.44

Finding the Fourth Proportional to 1,318.08, 1,816.32 and 1,261.44

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Solution

The fourth proportional to 1,318.08, 1,816.32 and 1,261.44 is: 1,738.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.08 : 1,816.32 = 1,261.44 : x
  2. Step 2: Convert to fraction form
    1,318.08/1,816.32 = 1,261.44/x
  3. Step 3: Cross multiply
    1,318.08x = 1,816.32 × 1,261.44
  4. Step 4: Simplify right side
    1,318.08x = 2,291,178.70
  5. Step 5: Solve for x
    x = 2,291,178.70/1,318.08
  6. Step 6: Final answer
    x = 1,738.27

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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.