Home / 2,887.41-4,330.29-939.78

Finding the Fourth Proportional to 2,887.41, 4,330.29 and 939.78

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Solution

The fourth proportional to 2,887.41, 4,330.29 and 939.78 is: 1,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.41 : 4,330.29 = 939.78 : x
  2. Step 2: Convert to fraction form
    2,887.41/4,330.29 = 939.78/x
  3. Step 3: Cross multiply
    2,887.41x = 4,330.29 × 939.78
  4. Step 4: Simplify right side
    2,887.41x = 4,069,519.94
  5. Step 5: Solve for x
    x = 4,069,519.94/2,887.41
  6. Step 6: Final answer
    x = 1,409.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.