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Finding the Fourth Proportional to 1,308.35, 1,963.53 and 683.03

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Solution

The fourth proportional to 1,308.35, 1,963.53 and 683.03 is: 1,025.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.35 : 1,963.53 = 683.03 : x
  2. Step 2: Convert to fraction form
    1,308.35/1,963.53 = 683.03/x
  3. Step 3: Cross multiply
    1,308.35x = 1,963.53 × 683.03
  4. Step 4: Simplify right side
    1,308.35x = 1,341,140.08
  5. Step 5: Solve for x
    x = 1,341,140.08/1,308.35
  6. Step 6: Final answer
    x = 1,025.07

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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.