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Finding the Fourth Proportional to 1,080.40, 1,620.90 and 532.60

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Solution

The fourth proportional to 1,080.40, 1,620.90 and 532.60 is: 799.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.40 : 1,620.90 = 532.60 : x
  2. Step 2: Convert to fraction form
    1,080.40/1,620.90 = 532.60/x
  3. Step 3: Cross multiply
    1,080.40x = 1,620.90 × 532.60
  4. Step 4: Simplify right side
    1,080.40x = 863,291.34
  5. Step 5: Solve for x
    x = 863,291.34/1,080.40
  6. Step 6: Final answer
    x = 799.05

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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.