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Finding the Fourth Proportional to 636,219.87, 953,969.50 and 209,640.03

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Solution

The fourth proportional to 636,219.87, 953,969.50 and 209,640.03 is: 314,341.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,219.87 : 953,969.50 = 209,640.03 : x
  2. Step 2: Convert to fraction form
    636,219.87/953,969.50 = 209,640.03/x
  3. Step 3: Cross multiply
    636,219.87x = 953,969.50 × 209,640.03
  4. Step 4: Simplify right side
    636,219.87x = 199,990,194,599.09
  5. Step 5: Solve for x
    x = 199,990,194,599.09/636,219.87
  6. Step 6: Final answer
    x = 314,341.32

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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.