Home / 1,587.65-2,190.96-889.03

Finding the Fourth Proportional to 1,587.65, 2,190.96 and 889.03

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Solution

The fourth proportional to 1,587.65, 2,190.96 and 889.03 is: 1,226.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.65 : 2,190.96 = 889.03 : x
  2. Step 2: Convert to fraction form
    1,587.65/2,190.96 = 889.03/x
  3. Step 3: Cross multiply
    1,587.65x = 2,190.96 × 889.03
  4. Step 4: Simplify right side
    1,587.65x = 1,947,824.72
  5. Step 5: Solve for x
    x = 1,947,824.72/1,587.65
  6. Step 6: Final answer
    x = 1,226.86

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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.