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Finding the Fourth Proportional to 311,389.92, 429,749.83 and 190,611.02

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Solution

The fourth proportional to 311,389.92, 429,749.83 and 190,611.02 is: 263,062.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,389.92 : 429,749.83 = 190,611.02 : x
  2. Step 2: Convert to fraction form
    311,389.92/429,749.83 = 190,611.02/x
  3. Step 3: Cross multiply
    311,389.92x = 429,749.83 × 190,611.02
  4. Step 4: Simplify right side
    311,389.92x = 81,915,054,753.77
  5. Step 5: Solve for x
    x = 81,915,054,753.77/311,389.92
  6. Step 6: Final answer
    x = 263,062.64

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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.