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Finding the Fourth Proportional to 893.15, 1,339.78 and 345.33

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Solution

The fourth proportional to 893.15, 1,339.78 and 345.33 is: 518.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.15 : 1,339.78 = 345.33 : x
  2. Step 2: Convert to fraction form
    893.15/1,339.78 = 345.33/x
  3. Step 3: Cross multiply
    893.15x = 1,339.78 × 345.33
  4. Step 4: Simplify right side
    893.15x = 462,666.23
  5. Step 5: Solve for x
    x = 462,666.23/893.15
  6. Step 6: Final answer
    x = 518.02

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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.