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Finding the Fourth Proportional to 1,658.23, 2,487.63 and 683.80

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Solution

The fourth proportional to 1,658.23, 2,487.63 and 683.80 is: 1,025.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.23 : 2,487.63 = 683.80 : x
  2. Step 2: Convert to fraction form
    1,658.23/2,487.63 = 683.80/x
  3. Step 3: Cross multiply
    1,658.23x = 2,487.63 × 683.80
  4. Step 4: Simplify right side
    1,658.23x = 1,701,041.39
  5. Step 5: Solve for x
    x = 1,701,041.39/1,658.23
  6. Step 6: Final answer
    x = 1,025.82

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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.