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Finding the Fourth Proportional to 488,790.30, 733,841.55 and 312,080.70

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Solution

The fourth proportional to 488,790.30, 733,841.55 and 312,080.70 is: 468,539.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,790.30 : 733,841.55 = 312,080.70 : x
  2. Step 2: Convert to fraction form
    488,790.30/733,841.55 = 312,080.70/x
  3. Step 3: Cross multiply
    488,790.30x = 733,841.55 × 312,080.70
  4. Step 4: Simplify right side
    488,790.30x = 229,017,784,613.09
  5. Step 5: Solve for x
    x = 229,017,784,613.09/488,790.30
  6. Step 6: Final answer
    x = 468,539.95

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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.