Home / 1,278.26-1,763.12-1,235.40

Finding the Fourth Proportional to 1,278.26, 1,763.12 and 1,235.40

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Solution

The fourth proportional to 1,278.26, 1,763.12 and 1,235.40 is: 1,704.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.26 : 1,763.12 = 1,235.40 : x
  2. Step 2: Convert to fraction form
    1,278.26/1,763.12 = 1,235.40/x
  3. Step 3: Cross multiply
    1,278.26x = 1,763.12 × 1,235.40
  4. Step 4: Simplify right side
    1,278.26x = 2,178,158.45
  5. Step 5: Solve for x
    x = 2,178,158.45/1,278.26
  6. Step 6: Final answer
    x = 1,704.00

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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.