Home / 3,120.64-4,306.47-1,723.40

Finding the Fourth Proportional to 3,120.64, 4,306.47 and 1,723.40

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Solution

The fourth proportional to 3,120.64, 4,306.47 and 1,723.40 is: 2,378.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.64 : 4,306.47 = 1,723.40 : x
  2. Step 2: Convert to fraction form
    3,120.64/4,306.47 = 1,723.40/x
  3. Step 3: Cross multiply
    3,120.64x = 4,306.47 × 1,723.40
  4. Step 4: Simplify right side
    3,120.64x = 7,421,770.40
  5. Step 5: Solve for x
    x = 7,421,770.40/3,120.64
  6. Step 6: Final answer
    x = 2,378.28

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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.