Home / 3,120.79-4,684.36-1,561.92

Finding the Fourth Proportional to 3,120.79, 4,684.36 and 1,561.92

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Solution

The fourth proportional to 3,120.79, 4,684.36 and 1,561.92 is: 2,344.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.79 : 4,684.36 = 1,561.92 : x
  2. Step 2: Convert to fraction form
    3,120.79/4,684.36 = 1,561.92/x
  3. Step 3: Cross multiply
    3,120.79x = 4,684.36 × 1,561.92
  4. Step 4: Simplify right side
    3,120.79x = 7,316,595.57
  5. Step 5: Solve for x
    x = 7,316,595.57/3,120.79
  6. Step 6: Final answer
    x = 2,344.47

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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.