Home / 2,178.58-3,005.75-1,234.25

Finding the Fourth Proportional to 2,178.58, 3,005.75 and 1,234.25

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Solution

The fourth proportional to 2,178.58, 3,005.75 and 1,234.25 is: 1,702.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.58 : 3,005.75 = 1,234.25 : x
  2. Step 2: Convert to fraction form
    2,178.58/3,005.75 = 1,234.25/x
  3. Step 3: Cross multiply
    2,178.58x = 3,005.75 × 1,234.25
  4. Step 4: Simplify right side
    2,178.58x = 3,709,840.77
  5. Step 5: Solve for x
    x = 3,709,840.77/2,178.58
  6. Step 6: Final answer
    x = 1,702.87

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1.5x scale

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.