Home / 1,527.40-2,107.64-1,129.28

Finding the Fourth Proportional to 1,527.40, 2,107.64 and 1,129.28

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Solution

The fourth proportional to 1,527.40, 2,107.64 and 1,129.28 is: 1,558.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,527.40 : 2,107.64 = 1,129.28 : x
  2. Step 2: Convert to fraction form
    1,527.40/2,107.64 = 1,129.28/x
  3. Step 3: Cross multiply
    1,527.40x = 2,107.64 × 1,129.28
  4. Step 4: Simplify right side
    1,527.40x = 2,380,115.70
  5. Step 5: Solve for x
    x = 2,380,115.70/1,527.40
  6. Step 6: Final answer
    x = 1,558.28

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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.