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Finding the Fourth Proportional to 822.41, 1,137.12 and 718.67

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Solution

The fourth proportional to 822.41, 1,137.12 and 718.67 is: 993.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.41 : 1,137.12 = 718.67 : x
  2. Step 2: Convert to fraction form
    822.41/1,137.12 = 718.67/x
  3. Step 3: Cross multiply
    822.41x = 1,137.12 × 718.67
  4. Step 4: Simplify right side
    822.41x = 817,214.03
  5. Step 5: Solve for x
    x = 817,214.03/822.41
  6. Step 6: Final answer
    x = 993.68

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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.