Finding the Fourth Proportional to 1,319,257,463.12, 1,820,568,257.10 and 716,422,816.80
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Solution
The fourth proportional to 1,319,257,463.12, 1,820,568,257.10 and 716,422,816.80 is: 988,659,663.02
Step by Step Solution
- Step 1: Write the proportion equation
1,319,257,463.12 : 1,820,568,257.10 = 716,422,816.80 : x - Step 2: Convert to fraction form
1,319,257,463.12/1,820,568,257.10 = 716,422,816.80/x - Step 3: Cross multiply
1,319,257,463.12x = 1,820,568,257.10 × 716,422,816.80 - Step 4: Simplify right side
1,319,257,463.12x = 1,304,296,638,928,248,320 - Step 5: Solve for x
x = 1,304,296,638,928,248,320/1,319,257,463.12 - Step 6: Final answer
x = 988,659,663.02
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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.