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Finding the Fourth Proportional to 957.36, 1,436.04 and 820.20

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Solution

The fourth proportional to 957.36, 1,436.04 and 820.20 is: 1,230.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.36 : 1,436.04 = 820.20 : x
  2. Step 2: Convert to fraction form
    957.36/1,436.04 = 820.20/x
  3. Step 3: Cross multiply
    957.36x = 1,436.04 × 820.20
  4. Step 4: Simplify right side
    957.36x = 1,177,840.01
  5. Step 5: Solve for x
    x = 1,177,840.01/957.36
  6. Step 6: Final answer
    x = 1,230.30

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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.