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Finding the Fourth Proportional to 1,107.67, 1,658.67 and 847.93

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Solution

The fourth proportional to 1,107.67, 1,658.67 and 847.93 is: 1,269.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.67 : 1,658.67 = 847.93 : x
  2. Step 2: Convert to fraction form
    1,107.67/1,658.67 = 847.93/x
  3. Step 3: Cross multiply
    1,107.67x = 1,658.67 × 847.93
  4. Step 4: Simplify right side
    1,107.67x = 1,406,436.05
  5. Step 5: Solve for x
    x = 1,406,436.05/1,107.67
  6. Step 6: Final answer
    x = 1,269.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.