Home / 1,587.36-2,190.56-879.22

Finding the Fourth Proportional to 1,587.36, 2,190.56 and 879.22

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Solution

The fourth proportional to 1,587.36, 2,190.56 and 879.22 is: 1,213.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.36 : 2,190.56 = 879.22 : x
  2. Step 2: Convert to fraction form
    1,587.36/2,190.56 = 879.22/x
  3. Step 3: Cross multiply
    1,587.36x = 2,190.56 × 879.22
  4. Step 4: Simplify right side
    1,587.36x = 1,925,985.80
  5. Step 5: Solve for x
    x = 1,925,985.80/1,587.36
  6. Step 6: Final answer
    x = 1,213.33

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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.