Home / 3,485.20-4,811.45-2,686.78

Finding the Fourth Proportional to 3,485.20, 4,811.45 and 2,686.78

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Solution

The fourth proportional to 3,485.20, 4,811.45 and 2,686.78 is: 3,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.20 : 4,811.45 = 2,686.78 : x
  2. Step 2: Convert to fraction form
    3,485.20/4,811.45 = 2,686.78/x
  3. Step 3: Cross multiply
    3,485.20x = 4,811.45 × 2,686.78
  4. Step 4: Simplify right side
    3,485.20x = 12,927,307.63
  5. Step 5: Solve for x
    x = 12,927,307.63/3,485.20
  6. Step 6: Final answer
    x = 3,709.20

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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.