Finding the Fourth Proportional to 912,322,429.24, 1,259,031,506.16 and 515,836,901.92
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Solution
The fourth proportional to 912,322,429.24, 1,259,031,506.16 and 515,836,901.92 is: 711,869,938.46
Step by Step Solution
- Step 1: Write the proportion equation
912,322,429.24 : 1,259,031,506.16 = 515,836,901.92 : x - Step 2: Convert to fraction form
912,322,429.24/1,259,031,506.16 = 515,836,901.92/x - Step 3: Cross multiply
912,322,429.24x = 1,259,031,506.16 × 515,836,901.92 - Step 4: Simplify right side
912,322,429.24x = 649,454,911,557,245,824 - Step 5: Solve for x
x = 649,454,911,557,245,824/912,322,429.24 - Step 6: Final answer
x = 711,869,938.46
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Double scale
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Similar ratio
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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.