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Finding the Fourth Proportional to 381,730.40, 571,429.20 and 297,749.60

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Solution

The fourth proportional to 381,730.40, 571,429.20 and 297,749.60 is: 445,714.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,730.40 : 571,429.20 = 297,749.60 : x
  2. Step 2: Convert to fraction form
    381,730.40/571,429.20 = 297,749.60/x
  3. Step 3: Cross multiply
    381,730.40x = 571,429.20 × 297,749.60
  4. Step 4: Simplify right side
    381,730.40x = 170,142,815,728.32
  5. Step 5: Solve for x
    x = 170,142,815,728.32/381,730.40
  6. Step 6: Final answer
    x = 445,714.61

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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.