Home / 3,124.89-4,312.31-1,708.55

Finding the Fourth Proportional to 3,124.89, 4,312.31 and 1,708.55

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Solution

The fourth proportional to 3,124.89, 4,312.31 and 1,708.55 is: 2,357.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.89 : 4,312.31 = 1,708.55 : x
  2. Step 2: Convert to fraction form
    3,124.89/4,312.31 = 1,708.55/x
  3. Step 3: Cross multiply
    3,124.89x = 4,312.31 × 1,708.55
  4. Step 4: Simplify right side
    3,124.89x = 7,367,797.25
  5. Step 5: Solve for x
    x = 7,367,797.25/3,124.89
  6. Step 6: Final answer
    x = 2,357.78

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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.