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Finding the Fourth Proportional to 345,511.80, 518,267.70 and 308,770.20

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Solution

The fourth proportional to 345,511.80, 518,267.70 and 308,770.20 is: 463,155.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,511.80 : 518,267.70 = 308,770.20 : x
  2. Step 2: Convert to fraction form
    345,511.80/518,267.70 = 308,770.20/x
  3. Step 3: Cross multiply
    345,511.80x = 518,267.70 × 308,770.20
  4. Step 4: Simplify right side
    345,511.80x = 160,025,621,382.54
  5. Step 5: Solve for x
    x = 160,025,621,382.54/345,511.80
  6. Step 6: Final answer
    x = 463,155.30

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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.