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Finding the Fourth Proportional to 1,586.75, 2,189.72 and 888.13

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Solution

The fourth proportional to 1,586.75, 2,189.72 and 888.13 is: 1,225.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.75 : 2,189.72 = 888.13 : x
  2. Step 2: Convert to fraction form
    1,586.75/2,189.72 = 888.13/x
  3. Step 3: Cross multiply
    1,586.75x = 2,189.72 × 888.13
  4. Step 4: Simplify right side
    1,586.75x = 1,944,756.02
  5. Step 5: Solve for x
    x = 1,944,756.02/1,586.75
  6. Step 6: Final answer
    x = 1,225.62

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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.