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Finding the Fourth Proportional to 957.39, 1,320.87 and 662.14

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Solution

The fourth proportional to 957.39, 1,320.87 and 662.14 is: 913.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.39 : 1,320.87 = 662.14 : x
  2. Step 2: Convert to fraction form
    957.39/1,320.87 = 662.14/x
  3. Step 3: Cross multiply
    957.39x = 1,320.87 × 662.14
  4. Step 4: Simplify right side
    957.39x = 874,600.86
  5. Step 5: Solve for x
    x = 874,600.86/957.39
  6. Step 6: Final answer
    x = 913.53

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1.5x scale

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.