Home / 1,587.36-2,190.60-888.78

Finding the Fourth Proportional to 1,587.36, 2,190.60 and 888.78

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Solution

The fourth proportional to 1,587.36, 2,190.60 and 888.78 is: 1,226.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.36 : 2,190.60 = 888.78 : x
  2. Step 2: Convert to fraction form
    1,587.36/2,190.60 = 888.78/x
  3. Step 3: Cross multiply
    1,587.36x = 2,190.60 × 888.78
  4. Step 4: Simplify right side
    1,587.36x = 1,946,961.47
  5. Step 5: Solve for x
    x = 1,946,961.47/1,587.36
  6. Step 6: Final answer
    x = 1,226.54

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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.