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Finding the Fourth Proportional to 1,587.33, 2,190.48 and 879.23

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Solution

The fourth proportional to 1,587.33, 2,190.48 and 879.23 is: 1,213.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.33 : 2,190.48 = 879.23 : x
  2. Step 2: Convert to fraction form
    1,587.33/2,190.48 = 879.23/x
  3. Step 3: Cross multiply
    1,587.33x = 2,190.48 × 879.23
  4. Step 4: Simplify right side
    1,587.33x = 1,925,924.78
  5. Step 5: Solve for x
    x = 1,925,924.78/1,587.33
  6. Step 6: Final answer
    x = 1,213.31

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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.