Home / 3,579.15-4,938.72-1,985.55

Finding the Fourth Proportional to 3,579.15, 4,938.72 and 1,985.55

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Solution

The fourth proportional to 3,579.15, 4,938.72 and 1,985.55 is: 2,739.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.15 : 4,938.72 = 1,985.55 : x
  2. Step 2: Convert to fraction form
    3,579.15/4,938.72 = 1,985.55/x
  3. Step 3: Cross multiply
    3,579.15x = 4,938.72 × 1,985.55
  4. Step 4: Simplify right side
    3,579.15x = 9,806,075.50
  5. Step 5: Solve for x
    x = 9,806,075.50/3,579.15
  6. Step 6: Final answer
    x = 2,739.78

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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.