Home / 1,587.45-2,190.60-879.27

Finding the Fourth Proportional to 1,587.45, 2,190.60 and 879.27

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Solution

The fourth proportional to 1,587.45, 2,190.60 and 879.27 is: 1,213.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.45 : 2,190.60 = 879.27 : x
  2. Step 2: Convert to fraction form
    1,587.45/2,190.60 = 879.27/x
  3. Step 3: Cross multiply
    1,587.45x = 2,190.60 × 879.27
  4. Step 4: Simplify right side
    1,587.45x = 1,926,128.86
  5. Step 5: Solve for x
    x = 1,926,128.86/1,587.45
  6. Step 6: Final answer
    x = 1,213.35

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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.