Home / 2,119.70-2,925.12-1,235.78

Finding the Fourth Proportional to 2,119.70, 2,925.12 and 1,235.78

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Solution

The fourth proportional to 2,119.70, 2,925.12 and 1,235.78 is: 1,705.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.70 : 2,925.12 = 1,235.78 : x
  2. Step 2: Convert to fraction form
    2,119.70/2,925.12 = 1,235.78/x
  3. Step 3: Cross multiply
    2,119.70x = 2,925.12 × 1,235.78
  4. Step 4: Simplify right side
    2,119.70x = 3,614,804.79
  5. Step 5: Solve for x
    x = 3,614,804.79/2,119.70
  6. Step 6: Final answer
    x = 1,705.34

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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.