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Finding the Fourth Proportional to 289,969.70, 434,954.55 and 205,988.90

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Solution

The fourth proportional to 289,969.70, 434,954.55 and 205,988.90 is: 308,983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,969.70 : 434,954.55 = 205,988.90 : x
  2. Step 2: Convert to fraction form
    289,969.70/434,954.55 = 205,988.90/x
  3. Step 3: Cross multiply
    289,969.70x = 434,954.55 × 205,988.90
  4. Step 4: Simplify right side
    289,969.70x = 89,595,809,304.50
  5. Step 5: Solve for x
    x = 89,595,809,304.50/289,969.70
  6. Step 6: Final answer
    x = 308,983.35

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Similar ratio
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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.