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Finding the Fourth Proportional to 1,235.49, 1,705 and 676.00

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Solution

The fourth proportional to 1,235.49, 1,705 and 676.00 is: 932.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.49 : 1,705 = 676.00 : x
  2. Step 2: Convert to fraction form
    1,235.49/1,705 = 676.00/x
  3. Step 3: Cross multiply
    1,235.49x = 1,705 × 676.00
  4. Step 4: Simplify right side
    1,235.49x = 1,152,571.48
  5. Step 5: Solve for x
    x = 1,152,571.48/1,235.49
  6. Step 6: Final answer
    x = 932.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.