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Finding the Fourth Proportional to 1,076.94, 1,615.05 and 383.49

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Solution

The fourth proportional to 1,076.94, 1,615.05 and 383.49 is: 575.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.94 : 1,615.05 = 383.49 : x
  2. Step 2: Convert to fraction form
    1,076.94/1,615.05 = 383.49/x
  3. Step 3: Cross multiply
    1,076.94x = 1,615.05 × 383.49
  4. Step 4: Simplify right side
    1,076.94x = 619,355.52
  5. Step 5: Solve for x
    x = 619,355.52/1,076.94
  6. Step 6: Final answer
    x = 575.11

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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.