Home / 3,430.85-4,734.65-1,938.78

Finding the Fourth Proportional to 3,430.85, 4,734.65 and 1,938.78

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Solution

The fourth proportional to 3,430.85, 4,734.65 and 1,938.78 is: 2,675.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.85 : 4,734.65 = 1,938.78 : x
  2. Step 2: Convert to fraction form
    3,430.85/4,734.65 = 1,938.78/x
  3. Step 3: Cross multiply
    3,430.85x = 4,734.65 × 1,938.78
  4. Step 4: Simplify right side
    3,430.85x = 9,179,449.57
  5. Step 5: Solve for x
    x = 9,179,449.57/3,430.85
  6. Step 6: Final answer
    x = 2,675.57

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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.