Finding the Fourth Proportional to 939,390,673.43, 1,296,281,947.96 and 515,982,453.07
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Solution
The fourth proportional to 939,390,673.43, 1,296,281,947.96 and 515,982,453.07 is: 712,013,391.55
Step by Step Solution
- Step 1: Write the proportion equation
939,390,673.43 : 1,296,281,947.96 = 515,982,453.07 : x - Step 2: Convert to fraction form
939,390,673.43/1,296,281,947.96 = 515,982,453.07/x - Step 3: Cross multiply
939,390,673.43x = 1,296,281,947.96 × 515,982,453.07 - Step 4: Simplify right side
939,390,673.43x = 668,858,739,374,228,224 - Step 5: Solve for x
x = 668,858,739,374,228,224/939,390,673.43 - Step 6: Final answer
x = 712,013,391.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.