Home / 311,236.02-428,601.78-270,381.51

Finding the Fourth Proportional to 311,236.02, 428,601.78 and 270,381.51

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Solution

The fourth proportional to 311,236.02, 428,601.78 and 270,381.51 is: 372,341.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,236.02 : 428,601.78 = 270,381.51 : x
  2. Step 2: Convert to fraction form
    311,236.02/428,601.78 = 270,381.51/x
  3. Step 3: Cross multiply
    311,236.02x = 428,601.78 × 270,381.51
  4. Step 4: Simplify right side
    311,236.02x = 115,885,996,465.09
  5. Step 5: Solve for x
    x = 115,885,996,465.09/311,236.02
  6. Step 6: Final answer
    x = 372,341.21

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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.