Home / 1,587.32-2,190.46-879.16

Finding the Fourth Proportional to 1,587.32, 2,190.46 and 879.16

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Solution

The fourth proportional to 1,587.32, 2,190.46 and 879.16 is: 1,213.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.32 : 2,190.46 = 879.16 : x
  2. Step 2: Convert to fraction form
    1,587.32/2,190.46 = 879.16/x
  3. Step 3: Cross multiply
    1,587.32x = 2,190.46 × 879.16
  4. Step 4: Simplify right side
    1,587.32x = 1,925,764.81
  5. Step 5: Solve for x
    x = 1,925,764.81/1,587.32
  6. Step 6: Final answer
    x = 1,213.22

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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.