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Finding the Fourth Proportional to 2,154.56, 3,231.84 and 615.68

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Solution

The fourth proportional to 2,154.56, 3,231.84 and 615.68 is: 923.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.56 : 3,231.84 = 615.68 : x
  2. Step 2: Convert to fraction form
    2,154.56/3,231.84 = 615.68/x
  3. Step 3: Cross multiply
    2,154.56x = 3,231.84 × 615.68
  4. Step 4: Simplify right side
    2,154.56x = 1,989,779.25
  5. Step 5: Solve for x
    x = 1,989,779.25/2,154.56
  6. Step 6: Final answer
    x = 923.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.