Finding the Fourth Proportional to 912,719,315.70, 1,361,405,168.40 and 828,929,230.62
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Solution
The fourth proportional to 912,719,315.70, 1,361,405,168.40 and 828,929,230.62 is: 1,236,424,516.71
Step by Step Solution
- Step 1: Write the proportion equation
912,719,315.70 : 1,361,405,168.40 = 828,929,230.62 : x - Step 2: Convert to fraction form
912,719,315.70/1,361,405,168.40 = 828,929,230.62/x - Step 3: Cross multiply
912,719,315.70x = 1,361,405,168.40 × 828,929,230.62 - Step 4: Simplify right side
912,719,315.70x = 1,128,508,538,803,903,616 - Step 5: Solve for x
x = 1,128,508,538,803,903,616/912,719,315.70 - Step 6: Final answer
x = 1,236,424,516.71
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.