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Finding the Fourth Proportional to 957.54, 1,320.98 and 662.28

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Solution

The fourth proportional to 957.54, 1,320.98 and 662.28 is: 913.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.54 : 1,320.98 = 662.28 : x
  2. Step 2: Convert to fraction form
    957.54/1,320.98 = 662.28/x
  3. Step 3: Cross multiply
    957.54x = 1,320.98 × 662.28
  4. Step 4: Simplify right side
    957.54x = 874,858.63
  5. Step 5: Solve for x
    x = 874,858.63/957.54
  6. Step 6: Final answer
    x = 913.65

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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.