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Finding the Fourth Proportional to 1,235.80, 1,705.46 and 676.32

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Solution

The fourth proportional to 1,235.80, 1,705.46 and 676.32 is: 933.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.80 : 1,705.46 = 676.32 : x
  2. Step 2: Convert to fraction form
    1,235.80/1,705.46 = 676.32/x
  3. Step 3: Cross multiply
    1,235.80x = 1,705.46 × 676.32
  4. Step 4: Simplify right side
    1,235.80x = 1,153,433.33
  5. Step 5: Solve for x
    x = 1,153,433.33/1,235.80
  6. Step 6: Final answer
    x = 933.35

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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.