Home / 3,430.78-4,734.51-1,938.38

Finding the Fourth Proportional to 3,430.78, 4,734.51 and 1,938.38

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Solution

The fourth proportional to 3,430.78, 4,734.51 and 1,938.38 is: 2,674.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.78 : 4,734.51 = 1,938.38 : x
  2. Step 2: Convert to fraction form
    3,430.78/4,734.51 = 1,938.38/x
  3. Step 3: Cross multiply
    3,430.78x = 4,734.51 × 1,938.38
  4. Step 4: Simplify right side
    3,430.78x = 9,177,288.81
  5. Step 5: Solve for x
    x = 9,177,288.81/3,430.78
  6. Step 6: Final answer
    x = 2,674.99

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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.