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Finding the Fourth Proportional to 957.53, 1,321.28 and 584.60

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Solution

The fourth proportional to 957.53, 1,321.28 and 584.60 is: 806.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.53 : 1,321.28 = 584.60 : x
  2. Step 2: Convert to fraction form
    957.53/1,321.28 = 584.60/x
  3. Step 3: Cross multiply
    957.53x = 1,321.28 × 584.60
  4. Step 4: Simplify right side
    957.53x = 772,410.76
  5. Step 5: Solve for x
    x = 772,410.76/957.53
  6. Step 6: Final answer
    x = 806.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.