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Finding the Fourth Proportional to 893.76, 1,234.08 and 719.88

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Solution

The fourth proportional to 893.76, 1,234.08 and 719.88 is: 993.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.76 : 1,234.08 = 719.88 : x
  2. Step 2: Convert to fraction form
    893.76/1,234.08 = 719.88/x
  3. Step 3: Cross multiply
    893.76x = 1,234.08 × 719.88
  4. Step 4: Simplify right side
    893.76x = 888,389.51
  5. Step 5: Solve for x
    x = 888,389.51/893.76
  6. Step 6: Final answer
    x = 993.99

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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.