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Finding the Fourth Proportional to 1,299.95, 1,948.39 and 683.34

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Solution

The fourth proportional to 1,299.95, 1,948.39 and 683.34 is: 1,024.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.95 : 1,948.39 = 683.34 : x
  2. Step 2: Convert to fraction form
    1,299.95/1,948.39 = 683.34/x
  3. Step 3: Cross multiply
    1,299.95x = 1,948.39 × 683.34
  4. Step 4: Simplify right side
    1,299.95x = 1,331,403.81
  5. Step 5: Solve for x
    x = 1,331,403.81/1,299.95
  6. Step 6: Final answer
    x = 1,024.20

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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.