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Finding the Fourth Proportional to 1,658.12, 2,485.74 and 683.54

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Solution

The fourth proportional to 1,658.12, 2,485.74 and 683.54 is: 1,024.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.12 : 2,485.74 = 683.54 : x
  2. Step 2: Convert to fraction form
    1,658.12/2,485.74 = 683.54/x
  3. Step 3: Cross multiply
    1,658.12x = 2,485.74 × 683.54
  4. Step 4: Simplify right side
    1,658.12x = 1,699,102.72
  5. Step 5: Solve for x
    x = 1,699,102.72/1,658.12
  6. Step 6: Final answer
    x = 1,024.72

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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.