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Finding the Fourth Proportional to 893.84, 1,340.78 and 277.47

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Solution

The fourth proportional to 893.84, 1,340.78 and 277.47 is: 416.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.84 : 1,340.78 = 277.47 : x
  2. Step 2: Convert to fraction form
    893.84/1,340.78 = 277.47/x
  3. Step 3: Cross multiply
    893.84x = 1,340.78 × 277.47
  4. Step 4: Simplify right side
    893.84x = 372,026.23
  5. Step 5: Solve for x
    x = 372,026.23/893.84
  6. Step 6: Final answer
    x = 416.21

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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.