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Finding the Fourth Proportional to 893.34, 1,340.51 and 345.55

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Solution

The fourth proportional to 893.34, 1,340.51 and 345.55 is: 518.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.34 : 1,340.51 = 345.55 : x
  2. Step 2: Convert to fraction form
    893.34/1,340.51 = 345.55/x
  3. Step 3: Cross multiply
    893.34x = 1,340.51 × 345.55
  4. Step 4: Simplify right side
    893.34x = 463,213.23
  5. Step 5: Solve for x
    x = 463,213.23/893.34
  6. Step 6: Final answer
    x = 518.52

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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.