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Finding the Fourth Proportional to 445,511.80, 668,267.70 and 312,542.20

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Solution

The fourth proportional to 445,511.80, 668,267.70 and 312,542.20 is: 468,813.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,511.80 : 668,267.70 = 312,542.20 : x
  2. Step 2: Convert to fraction form
    445,511.80/668,267.70 = 312,542.20/x
  3. Step 3: Cross multiply
    445,511.80x = 668,267.70 × 312,542.20
  4. Step 4: Simplify right side
    445,511.80x = 208,861,857,146.94
  5. Step 5: Solve for x
    x = 208,861,857,146.94/445,511.80
  6. Step 6: Final answer
    x = 468,813.30

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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.