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Finding the Fourth Proportional to 965.18, 1,447.94 and 388.10

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Solution

The fourth proportional to 965.18, 1,447.94 and 388.10 is: 582.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.18 : 1,447.94 = 388.10 : x
  2. Step 2: Convert to fraction form
    965.18/1,447.94 = 388.10/x
  3. Step 3: Cross multiply
    965.18x = 1,447.94 × 388.10
  4. Step 4: Simplify right side
    965.18x = 561,945.51
  5. Step 5: Solve for x
    x = 561,945.51/965.18
  6. Step 6: Final answer
    x = 582.22

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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.