Home / 2,518.78-3,475.85-1,399.72

Finding the Fourth Proportional to 2,518.78, 3,475.85 and 1,399.72

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Solution

The fourth proportional to 2,518.78, 3,475.85 and 1,399.72 is: 1,931.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,518.78 : 3,475.85 = 1,399.72 : x
  2. Step 2: Convert to fraction form
    2,518.78/3,475.85 = 1,399.72/x
  3. Step 3: Cross multiply
    2,518.78x = 3,475.85 × 1,399.72
  4. Step 4: Simplify right side
    2,518.78x = 4,865,201.07
  5. Step 5: Solve for x
    x = 4,865,201.07/2,518.78
  6. Step 6: Final answer
    x = 1,931.57

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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.