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Finding the Fourth Proportional to 893.61, 1,340.60 and 454.92

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Solution

The fourth proportional to 893.61, 1,340.60 and 454.92 is: 682.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.61 : 1,340.60 = 454.92 : x
  2. Step 2: Convert to fraction form
    893.61/1,340.60 = 454.92/x
  3. Step 3: Cross multiply
    893.61x = 1,340.60 × 454.92
  4. Step 4: Simplify right side
    893.61x = 609,865.75
  5. Step 5: Solve for x
    x = 609,865.75/893.61
  6. Step 6: Final answer
    x = 682.48

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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.