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Finding the Fourth Proportional to 957.54, 1,436.90 and 518.60

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Solution

The fourth proportional to 957.54, 1,436.90 and 518.60 is: 778.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.54 : 1,436.90 = 518.60 : x
  2. Step 2: Convert to fraction form
    957.54/1,436.90 = 518.60/x
  3. Step 3: Cross multiply
    957.54x = 1,436.90 × 518.60
  4. Step 4: Simplify right side
    957.54x = 745,166.56
  5. Step 5: Solve for x
    x = 745,166.56/957.54
  6. Step 6: Final answer
    x = 778.21

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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.