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Finding the Fourth Proportional to 312,230.80, 430,879.68 and 168,990.88

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Solution

The fourth proportional to 312,230.80, 430,879.68 and 168,990.88 is: 233,208.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,230.80 : 430,879.68 = 168,990.88 : x
  2. Step 2: Convert to fraction form
    312,230.80/430,879.68 = 168,990.88/x
  3. Step 3: Cross multiply
    312,230.80x = 430,879.68 × 168,990.88
  4. Step 4: Simplify right side
    312,230.80x = 72,814,736,297.32
  5. Step 5: Solve for x
    x = 72,814,736,297.32/312,230.80
  6. Step 6: Final answer
    x = 233,208.05

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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.