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Finding the Fourth Proportional to 1,243.02, 1,715.40 and 683.53

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Solution

The fourth proportional to 1,243.02, 1,715.40 and 683.53 is: 943.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.02 : 1,715.40 = 683.53 : x
  2. Step 2: Convert to fraction form
    1,243.02/1,715.40 = 683.53/x
  3. Step 3: Cross multiply
    1,243.02x = 1,715.40 × 683.53
  4. Step 4: Simplify right side
    1,243.02x = 1,172,527.36
  5. Step 5: Solve for x
    x = 1,172,527.36/1,243.02
  6. Step 6: Final answer
    x = 943.29

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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.