Home / 1,528.31-2,107.13-1,261.82

Finding the Fourth Proportional to 1,528.31, 2,107.13 and 1,261.82

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Solution

The fourth proportional to 1,528.31, 2,107.13 and 1,261.82 is: 1,739.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.31 : 2,107.13 = 1,261.82 : x
  2. Step 2: Convert to fraction form
    1,528.31/2,107.13 = 1,261.82/x
  3. Step 3: Cross multiply
    1,528.31x = 2,107.13 × 1,261.82
  4. Step 4: Simplify right side
    1,528.31x = 2,658,801.93
  5. Step 5: Solve for x
    x = 2,658,801.93/1,528.31
  6. Step 6: Final answer
    x = 1,739.71

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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.