Home / 2,186.40-3,015.16-1,440.16

Finding the Fourth Proportional to 2,186.40, 3,015.16 and 1,440.16

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Solution

The fourth proportional to 2,186.40, 3,015.16 and 1,440.16 is: 1,986.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.40 : 3,015.16 = 1,440.16 : x
  2. Step 2: Convert to fraction form
    2,186.40/3,015.16 = 1,440.16/x
  3. Step 3: Cross multiply
    2,186.40x = 3,015.16 × 1,440.16
  4. Step 4: Simplify right side
    2,186.40x = 4,342,312.83
  5. Step 5: Solve for x
    x = 4,342,312.83/2,186.40
  6. Step 6: Final answer
    x = 1,986.06

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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.