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Finding the Fourth Proportional to 893.16, 1,340.28 and 345.60

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Solution

The fourth proportional to 893.16, 1,340.28 and 345.60 is: 518.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.16 : 1,340.28 = 345.60 : x
  2. Step 2: Convert to fraction form
    893.16/1,340.28 = 345.60/x
  3. Step 3: Cross multiply
    893.16x = 1,340.28 × 345.60
  4. Step 4: Simplify right side
    893.16x = 463,200.77
  5. Step 5: Solve for x
    x = 463,200.77/893.16
  6. Step 6: Final answer
    x = 518.61

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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.