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Finding the Fourth Proportional to 683.50, 943.19 and 403.74

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Solution

The fourth proportional to 683.50, 943.19 and 403.74 is: 557.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.50 : 943.19 = 403.74 : x
  2. Step 2: Convert to fraction form
    683.50/943.19 = 403.74/x
  3. Step 3: Cross multiply
    683.50x = 943.19 × 403.74
  4. Step 4: Simplify right side
    683.50x = 380,803.53
  5. Step 5: Solve for x
    x = 380,803.53/683.50
  6. Step 6: Final answer
    x = 557.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.