Home / 1,325.12-1,826.72-1,186.88

Finding the Fourth Proportional to 1,325.12, 1,826.72 and 1,186.88

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Solution

The fourth proportional to 1,325.12, 1,826.72 and 1,186.88 is: 1,636.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.12 : 1,826.72 = 1,186.88 : x
  2. Step 2: Convert to fraction form
    1,325.12/1,826.72 = 1,186.88/x
  3. Step 3: Cross multiply
    1,325.12x = 1,826.72 × 1,186.88
  4. Step 4: Simplify right side
    1,325.12x = 2,168,097.43
  5. Step 5: Solve for x
    x = 2,168,097.43/1,325.12
  6. Step 6: Final answer
    x = 1,636.15

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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.