Home / 2,921.36-4,381.32-1,690.16

Finding the Fourth Proportional to 2,921.36, 4,381.32 and 1,690.16

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Solution

The fourth proportional to 2,921.36, 4,381.32 and 1,690.16 is: 2,534.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.36 : 4,381.32 = 1,690.16 : x
  2. Step 2: Convert to fraction form
    2,921.36/4,381.32 = 1,690.16/x
  3. Step 3: Cross multiply
    2,921.36x = 4,381.32 × 1,690.16
  4. Step 4: Simplify right side
    2,921.36x = 7,405,131.81
  5. Step 5: Solve for x
    x = 7,405,131.81/2,921.36
  6. Step 6: Final answer
    x = 2,534.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.