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Finding the Fourth Proportional to 1,586.96, 2,190.12 and 888.56

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Solution

The fourth proportional to 1,586.96, 2,190.12 and 888.56 is: 1,226.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.96 : 2,190.12 = 888.56 : x
  2. Step 2: Convert to fraction form
    1,586.96/2,190.12 = 888.56/x
  3. Step 3: Cross multiply
    1,586.96x = 2,190.12 × 888.56
  4. Step 4: Simplify right side
    1,586.96x = 1,946,053.03
  5. Step 5: Solve for x
    x = 1,946,053.03/1,586.96
  6. Step 6: Final answer
    x = 1,226.28

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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.