Finding the Fourth Proportional to 861,716,077.80, 1,292,574,116.70 and 513,037,637.70
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Solution
The fourth proportional to 861,716,077.80, 1,292,574,116.70 and 513,037,637.70 is: 769,556,456.55
Step by Step Solution
- Step 1: Write the proportion equation
861,716,077.80 : 1,292,574,116.70 = 513,037,637.70 : x - Step 2: Convert to fraction form
861,716,077.80/1,292,574,116.70 = 513,037,637.70/x - Step 3: Cross multiply
861,716,077.80x = 1,292,574,116.70 × 513,037,637.70 - Step 4: Simplify right side
861,716,077.80x = 663,139,171,383,932,160 - Step 5: Solve for x
x = 663,139,171,383,932,160/861,716,077.80 - Step 6: Final answer
x = 769,556,456.55
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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.