Home / 1,555.12-2,146.06-856.49

Finding the Fourth Proportional to 1,555.12, 2,146.06 and 856.49

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Solution

The fourth proportional to 1,555.12, 2,146.06 and 856.49 is: 1,181.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.12 : 2,146.06 = 856.49 : x
  2. Step 2: Convert to fraction form
    1,555.12/2,146.06 = 856.49/x
  3. Step 3: Cross multiply
    1,555.12x = 2,146.06 × 856.49
  4. Step 4: Simplify right side
    1,555.12x = 1,838,074.65
  5. Step 5: Solve for x
    x = 1,838,074.65/1,555.12
  6. Step 6: Final answer
    x = 1,181.95

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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.