Home / 2,130.05-2,938.84-1,245.85

Finding the Fourth Proportional to 2,130.05, 2,938.84 and 1,245.85

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Solution

The fourth proportional to 2,130.05, 2,938.84 and 1,245.85 is: 1,718.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.05 : 2,938.84 = 1,245.85 : x
  2. Step 2: Convert to fraction form
    2,130.05/2,938.84 = 1,245.85/x
  3. Step 3: Cross multiply
    2,130.05x = 2,938.84 × 1,245.85
  4. Step 4: Simplify right side
    2,130.05x = 3,661,353.81
  5. Step 5: Solve for x
    x = 3,661,353.81/2,130.05
  6. Step 6: Final answer
    x = 1,718.91

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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.