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Finding the Fourth Proportional to 1,362.42, 2,043.27 and 388.53

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Solution

The fourth proportional to 1,362.42, 2,043.27 and 388.53 is: 582.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.42 : 2,043.27 = 388.53 : x
  2. Step 2: Convert to fraction form
    1,362.42/2,043.27 = 388.53/x
  3. Step 3: Cross multiply
    1,362.42x = 2,043.27 × 388.53
  4. Step 4: Simplify right side
    1,362.42x = 793,871.69
  5. Step 5: Solve for x
    x = 793,871.69/1,362.42
  6. Step 6: Final answer
    x = 582.69

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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.