Finding the Fourth Proportional to 1,565,708,596.79, 2,160,686,405.42 and 921,992,615.51
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Solution
The fourth proportional to 1,565,708,596.79, 2,160,686,405.42 and 921,992,615.51 is: 1,272,354,839.41
Step by Step Solution
- Step 1: Write the proportion equation
1,565,708,596.79 : 2,160,686,405.42 = 921,992,615.51 : x - Step 2: Convert to fraction form
1,565,708,596.79/2,160,686,405.42 = 921,992,615.51/x - Step 3: Cross multiply
1,565,708,596.79x = 2,160,686,405.42 × 921,992,615.51 - Step 4: Simplify right side
1,565,708,596.79x = 1,992,136,910,218,084,096 - Step 5: Solve for x
x = 1,992,136,910,218,084,096/1,565,708,596.79 - Step 6: Final answer
x = 1,272,354,839.41
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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.