Home / 1,008.18-1,511.20-423.04

Finding the Fourth Proportional to 1,008.18, 1,511.20 and 423.04

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Solution

The fourth proportional to 1,008.18, 1,511.20 and 423.04 is: 634.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.18 : 1,511.20 = 423.04 : x
  2. Step 2: Convert to fraction form
    1,008.18/1,511.20 = 423.04/x
  3. Step 3: Cross multiply
    1,008.18x = 1,511.20 × 423.04
  4. Step 4: Simplify right side
    1,008.18x = 639,298.05
  5. Step 5: Solve for x
    x = 639,298.05/1,008.18
  6. Step 6: Final answer
    x = 634.11

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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.