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Finding the Fourth Proportional to 1,935.89, 2,902.95 and 619.39

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Solution

The fourth proportional to 1,935.89, 2,902.95 and 619.39 is: 928.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,935.89 : 2,902.95 = 619.39 : x
  2. Step 2: Convert to fraction form
    1,935.89/2,902.95 = 619.39/x
  3. Step 3: Cross multiply
    1,935.89x = 2,902.95 × 619.39
  4. Step 4: Simplify right side
    1,935.89x = 1,798,040.59
  5. Step 5: Solve for x
    x = 1,798,040.59/1,935.89
  6. Step 6: Final answer
    x = 928.79

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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.