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Finding the Fourth Proportional to 699.42, 1,043.61 and 683.67

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Solution

The fourth proportional to 699.42, 1,043.61 and 683.67 is: 1,020.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.42 : 1,043.61 = 683.67 : x
  2. Step 2: Convert to fraction form
    699.42/1,043.61 = 683.67/x
  3. Step 3: Cross multiply
    699.42x = 1,043.61 × 683.67
  4. Step 4: Simplify right side
    699.42x = 713,484.85
  5. Step 5: Solve for x
    x = 713,484.85/699.42
  6. Step 6: Final answer
    x = 1,020.11

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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.