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Finding the Fourth Proportional to 683.07, 942.70 and 388.28

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Solution

The fourth proportional to 683.07, 942.70 and 388.28 is: 535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.07 : 942.70 = 388.28 : x
  2. Step 2: Convert to fraction form
    683.07/942.70 = 388.28/x
  3. Step 3: Cross multiply
    683.07x = 942.70 × 388.28
  4. Step 4: Simplify right side
    683.07x = 366,031.56
  5. Step 5: Solve for x
    x = 366,031.56/683.07
  6. Step 6: Final answer
    x = 535.86

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1.5x scale

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.