Home / 1,647.19-2,275.46-1,440.64

Finding the Fourth Proportional to 1,647.19, 2,275.46 and 1,440.64

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Solution

The fourth proportional to 1,647.19, 2,275.46 and 1,440.64 is: 1,990.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647.19 : 2,275.46 = 1,440.64 : x
  2. Step 2: Convert to fraction form
    1,647.19/2,275.46 = 1,440.64/x
  3. Step 3: Cross multiply
    1,647.19x = 2,275.46 × 1,440.64
  4. Step 4: Simplify right side
    1,647.19x = 3,278,118.69
  5. Step 5: Solve for x
    x = 3,278,118.69/1,647.19
  6. Step 6: Final answer
    x = 1,990.13

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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.