Finding the Fourth Proportional to 912,070,430.47, 1,258,623,473.97 and 494,373,747.70
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Solution
The fourth proportional to 912,070,430.47, 1,258,623,473.97 and 494,373,747.70 is: 682,217,494.38
Step by Step Solution
- Step 1: Write the proportion equation
912,070,430.47 : 1,258,623,473.97 = 494,373,747.70 : x - Step 2: Convert to fraction form
912,070,430.47/1,258,623,473.97 = 494,373,747.70/x - Step 3: Cross multiply
912,070,430.47x = 1,258,623,473.97 × 494,373,747.70 - Step 4: Simplify right side
912,070,430.47x = 622,230,403,769,742,336 - Step 5: Solve for x
x = 622,230,403,769,742,336/912,070,430.47 - Step 6: Final answer
x = 682,217,494.38
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Double scale
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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.