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Finding the Fourth Proportional to 935.16, 1,396.44 and 881.16

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Solution

The fourth proportional to 935.16, 1,396.44 and 881.16 is: 1,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.16 : 1,396.44 = 881.16 : x
  2. Step 2: Convert to fraction form
    935.16/1,396.44 = 881.16/x
  3. Step 3: Cross multiply
    935.16x = 1,396.44 × 881.16
  4. Step 4: Simplify right side
    935.16x = 1,230,487.07
  5. Step 5: Solve for x
    x = 1,230,487.07/935.16
  6. Step 6: Final answer
    x = 1,315.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.