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Finding the Fourth Proportional to 893.73, 1,339.77 and 619.95

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Solution

The fourth proportional to 893.73, 1,339.77 and 619.95 is: 929.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.73 : 1,339.77 = 619.95 : x
  2. Step 2: Convert to fraction form
    893.73/1,339.77 = 619.95/x
  3. Step 3: Cross multiply
    893.73x = 1,339.77 × 619.95
  4. Step 4: Simplify right side
    893.73x = 830,590.41
  5. Step 5: Solve for x
    x = 830,590.41/893.73
  6. Step 6: Final answer
    x = 929.35

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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.