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Finding the Fourth Proportional to 993.94, 1,371.60 and 551.84

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Solution

The fourth proportional to 993.94, 1,371.60 and 551.84 is: 761.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.94 : 1,371.60 = 551.84 : x
  2. Step 2: Convert to fraction form
    993.94/1,371.60 = 551.84/x
  3. Step 3: Cross multiply
    993.94x = 1,371.60 × 551.84
  4. Step 4: Simplify right side
    993.94x = 756,903.74
  5. Step 5: Solve for x
    x = 756,903.74/993.94
  6. Step 6: Final answer
    x = 761.52

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.