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Finding the Fourth Proportional to 712.37, 1,068.53 and 388.37

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Solution

The fourth proportional to 712.37, 1,068.53 and 388.37 is: 582.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.37 : 1,068.53 = 388.37 : x
  2. Step 2: Convert to fraction form
    712.37/1,068.53 = 388.37/x
  3. Step 3: Cross multiply
    712.37x = 1,068.53 × 388.37
  4. Step 4: Simplify right side
    712.37x = 414,978.68
  5. Step 5: Solve for x
    x = 414,978.68/712.37
  6. Step 6: Final answer
    x = 582.54

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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.