Home / 1,311.36-1,810.56-1,246.72

Finding the Fourth Proportional to 1,311.36, 1,810.56 and 1,246.72

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Solution

The fourth proportional to 1,311.36, 1,810.56 and 1,246.72 is: 1,721.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.36 : 1,810.56 = 1,246.72 : x
  2. Step 2: Convert to fraction form
    1,311.36/1,810.56 = 1,246.72/x
  3. Step 3: Cross multiply
    1,311.36x = 1,810.56 × 1,246.72
  4. Step 4: Simplify right side
    1,311.36x = 2,257,261.36
  5. Step 5: Solve for x
    x = 2,257,261.36/1,311.36
  6. Step 6: Final answer
    x = 1,721.31

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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.