Finding the Fourth Proportional to 638,863,237.80, 958,294,856.70 and 638,863,237.80
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Solution
The fourth proportional to 638,863,237.80, 958,294,856.70 and 638,863,237.80 is: 958,294,856.70
Step by Step Solution
- Step 1: Write the proportion equation
638,863,237.80 : 958,294,856.70 = 638,863,237.80 : x - Step 2: Convert to fraction form
638,863,237.80/958,294,856.70 = 638,863,237.80/x - Step 3: Cross multiply
638,863,237.80x = 958,294,856.70 × 638,863,237.80 - Step 4: Simplify right side
638,863,237.80x = 612,219,354,918,449,024 - Step 5: Solve for x
x = 612,219,354,918,449,024/638,863,237.80 - Step 6: Final answer
x = 958,294,856.70
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Double scale
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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.