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Finding the Fourth Proportional to 311,879.07, 430,393.37 and 168,639.21

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Solution

The fourth proportional to 311,879.07, 430,393.37 and 168,639.21 is: 232,722.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,879.07 : 430,393.37 = 168,639.21 : x
  2. Step 2: Convert to fraction form
    311,879.07/430,393.37 = 168,639.21/x
  3. Step 3: Cross multiply
    311,879.07x = 430,393.37 × 168,639.21
  4. Step 4: Simplify right side
    311,879.07x = 72,581,197,062.84
  5. Step 5: Solve for x
    x = 72,581,197,062.84/311,879.07
  6. Step 6: Final answer
    x = 232,722.24

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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.