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Finding the Fourth Proportional to 893.60, 1,339.76 and 460.48

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Solution

The fourth proportional to 893.60, 1,339.76 and 460.48 is: 690.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.60 : 1,339.76 = 460.48 : x
  2. Step 2: Convert to fraction form
    893.60/1,339.76 = 460.48/x
  3. Step 3: Cross multiply
    893.60x = 1,339.76 × 460.48
  4. Step 4: Simplify right side
    893.60x = 616,932.68
  5. Step 5: Solve for x
    x = 616,932.68/893.60
  6. Step 6: Final answer
    x = 690.39

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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.