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Finding the Fourth Proportional to 893.61, 1,340.45 and 634.77

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Solution

The fourth proportional to 893.61, 1,340.45 and 634.77 is: 952.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.61 : 1,340.45 = 634.77 : x
  2. Step 2: Convert to fraction form
    893.61/1,340.45 = 634.77/x
  3. Step 3: Cross multiply
    893.61x = 1,340.45 × 634.77
  4. Step 4: Simplify right side
    893.61x = 850,877.45
  5. Step 5: Solve for x
    x = 850,877.45/893.61
  6. Step 6: Final answer
    x = 952.18

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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.