Home / 1,155.30-1,731.96-1,090.86

Finding the Fourth Proportional to 1,155.30, 1,731.96 and 1,090.86

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Solution

The fourth proportional to 1,155.30, 1,731.96 and 1,090.86 is: 1,635.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.30 : 1,731.96 = 1,090.86 : x
  2. Step 2: Convert to fraction form
    1,155.30/1,731.96 = 1,090.86/x
  3. Step 3: Cross multiply
    1,155.30x = 1,731.96 × 1,090.86
  4. Step 4: Simplify right side
    1,155.30x = 1,889,325.89
  5. Step 5: Solve for x
    x = 1,889,325.89/1,155.30
  6. Step 6: Final answer
    x = 1,635.36

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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.