Finding the Fourth Proportional to 3,139,747,253.80, 4,709,620,880.70 and 958,709,890.60
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Solution
The fourth proportional to 3,139,747,253.80, 4,709,620,880.70 and 958,709,890.60 is: 1,438,064,835.90
Step by Step Solution
- Step 1: Write the proportion equation
3,139,747,253.80 : 4,709,620,880.70 = 958,709,890.60 : x - Step 2: Convert to fraction form
3,139,747,253.80/4,709,620,880.70 = 958,709,890.60/x - Step 3: Cross multiply
3,139,747,253.80x = 4,709,620,880.70 × 958,709,890.60 - Step 4: Simplify right side
3,139,747,253.80x = 4,515,160,119,303,372,800 - Step 5: Solve for x
x = 4,515,160,119,303,372,800/3,139,747,253.80 - Step 6: Final answer
x = 1,438,064,835.90
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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.