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Finding the Fourth Proportional to 1,721.94, 2,376.28 and 935.99

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Solution

The fourth proportional to 1,721.94, 2,376.28 and 935.99 is: 1,291.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.94 : 2,376.28 = 935.99 : x
  2. Step 2: Convert to fraction form
    1,721.94/2,376.28 = 935.99/x
  3. Step 3: Cross multiply
    1,721.94x = 2,376.28 × 935.99
  4. Step 4: Simplify right side
    1,721.94x = 2,224,174.32
  5. Step 5: Solve for x
    x = 2,224,174.32/1,721.94
  6. Step 6: Final answer
    x = 1,291.67

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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.