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Finding the Fourth Proportional to 1,554.87, 2,145.84 and 856.29

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Solution

The fourth proportional to 1,554.87, 2,145.84 and 856.29 is: 1,181.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,554.87 : 2,145.84 = 856.29 : x
  2. Step 2: Convert to fraction form
    1,554.87/2,145.84 = 856.29/x
  3. Step 3: Cross multiply
    1,554.87x = 2,145.84 × 856.29
  4. Step 4: Simplify right side
    1,554.87x = 1,837,461.33
  5. Step 5: Solve for x
    x = 1,837,461.33/1,554.87
  6. Step 6: Final answer
    x = 1,181.75

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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.