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Finding the Fourth Proportional to 1,076.84, 1,615.26 and 419.03

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Solution

The fourth proportional to 1,076.84, 1,615.26 and 419.03 is: 628.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.84 : 1,615.26 = 419.03 : x
  2. Step 2: Convert to fraction form
    1,076.84/1,615.26 = 419.03/x
  3. Step 3: Cross multiply
    1,076.84x = 1,615.26 × 419.03
  4. Step 4: Simplify right side
    1,076.84x = 676,834.32
  5. Step 5: Solve for x
    x = 676,834.32/1,076.84
  6. Step 6: Final answer
    x = 628.54

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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.