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Finding the Fourth Proportional to 893.55, 1,232.52 and 578.69

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Solution

The fourth proportional to 893.55, 1,232.52 and 578.69 is: 798.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.55 : 1,232.52 = 578.69 : x
  2. Step 2: Convert to fraction form
    893.55/1,232.52 = 578.69/x
  3. Step 3: Cross multiply
    893.55x = 1,232.52 × 578.69
  4. Step 4: Simplify right side
    893.55x = 713,240.84
  5. Step 5: Solve for x
    x = 713,240.84/893.55
  6. Step 6: Final answer
    x = 798.21

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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.