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Finding the Fourth Proportional to 957.32, 1,320.84 and 662.72

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Solution

The fourth proportional to 957.32, 1,320.84 and 662.72 is: 914.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.32 : 1,320.84 = 662.72 : x
  2. Step 2: Convert to fraction form
    957.32/1,320.84 = 662.72/x
  3. Step 3: Cross multiply
    957.32x = 1,320.84 × 662.72
  4. Step 4: Simplify right side
    957.32x = 875,347.08
  5. Step 5: Solve for x
    x = 875,347.08/957.32
  6. Step 6: Final answer
    x = 914.37

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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.