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Finding the Fourth Proportional to 893.34, 1,339.92 and 345.51

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Solution

The fourth proportional to 893.34, 1,339.92 and 345.51 is: 518.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.34 : 1,339.92 = 345.51 : x
  2. Step 2: Convert to fraction form
    893.34/1,339.92 = 345.51/x
  3. Step 3: Cross multiply
    893.34x = 1,339.92 × 345.51
  4. Step 4: Simplify right side
    893.34x = 462,955.76
  5. Step 5: Solve for x
    x = 462,955.76/893.34
  6. Step 6: Final answer
    x = 518.23

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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.