Home / 1,108.18-1,662.23-328.15

Finding the Fourth Proportional to 1,108.18, 1,662.23 and 328.15

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Solution

The fourth proportional to 1,108.18, 1,662.23 and 328.15 is: 492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.18 : 1,662.23 = 328.15 : x
  2. Step 2: Convert to fraction form
    1,108.18/1,662.23 = 328.15/x
  3. Step 3: Cross multiply
    1,108.18x = 1,662.23 × 328.15
  4. Step 4: Simplify right side
    1,108.18x = 545,460.77
  5. Step 5: Solve for x
    x = 545,460.77/1,108.18
  6. Step 6: Final answer
    x = 492.21

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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.