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Finding the Fourth Proportional to 893.71, 1,340.20 and 277.30

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Solution

The fourth proportional to 893.71, 1,340.20 and 277.30 is: 415.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.71 : 1,340.20 = 277.30 : x
  2. Step 2: Convert to fraction form
    893.71/1,340.20 = 277.30/x
  3. Step 3: Cross multiply
    893.71x = 1,340.20 × 277.30
  4. Step 4: Simplify right side
    893.71x = 371,637.46
  5. Step 5: Solve for x
    x = 371,637.46/893.71
  6. Step 6: Final answer
    x = 415.84

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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.