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Finding the Fourth Proportional to 1,955.67, 2,933.67 and 638.91

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Solution

The fourth proportional to 1,955.67, 2,933.67 and 638.91 is: 958.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.67 : 2,933.67 = 638.91 : x
  2. Step 2: Convert to fraction form
    1,955.67/2,933.67 = 638.91/x
  3. Step 3: Cross multiply
    1,955.67x = 2,933.67 × 638.91
  4. Step 4: Simplify right side
    1,955.67x = 1,874,351.10
  5. Step 5: Solve for x
    x = 1,874,351.10/1,955.67
  6. Step 6: Final answer
    x = 958.42

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1.5x scale

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.