Home / 1,555.10-2,145.96-856.46

Finding the Fourth Proportional to 1,555.10, 2,145.96 and 856.46

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Solution

The fourth proportional to 1,555.10, 2,145.96 and 856.46 is: 1,181.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.10 : 2,145.96 = 856.46 : x
  2. Step 2: Convert to fraction form
    1,555.10/2,145.96 = 856.46/x
  3. Step 3: Cross multiply
    1,555.10x = 2,145.96 × 856.46
  4. Step 4: Simplify right side
    1,555.10x = 1,837,928.90
  5. Step 5: Solve for x
    x = 1,837,928.90/1,555.10
  6. Step 6: Final answer
    x = 1,181.87

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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.