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Finding the Fourth Proportional to 1,554.46, 2,145.16 and 855.84

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Solution

The fourth proportional to 1,554.46, 2,145.16 and 855.84 is: 1,181.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,554.46 : 2,145.16 = 855.84 : x
  2. Step 2: Convert to fraction form
    1,554.46/2,145.16 = 855.84/x
  3. Step 3: Cross multiply
    1,554.46x = 2,145.16 × 855.84
  4. Step 4: Simplify right side
    1,554.46x = 1,835,908.37
  5. Step 5: Solve for x
    x = 1,835,908.37/1,554.46
  6. Step 6: Final answer
    x = 1,181.06

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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.