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Finding the Fourth Proportional to 219,803.20, 329,704.80 and 145,007.80

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Solution

The fourth proportional to 219,803.20, 329,704.80 and 145,007.80 is: 217,511.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,803.20 : 329,704.80 = 145,007.80 : x
  2. Step 2: Convert to fraction form
    219,803.20/329,704.80 = 145,007.80/x
  3. Step 3: Cross multiply
    219,803.20x = 329,704.80 × 145,007.80
  4. Step 4: Simplify right side
    219,803.20x = 47,809,767,697.44
  5. Step 5: Solve for x
    x = 47,809,767,697.44/219,803.20
  6. Step 6: Final answer
    x = 217,511.70

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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.