Finding the Fourth Proportional to 1,389,923,095.68, 1,917,627,207.12 and 787,011,336
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Solution
The fourth proportional to 1,389,923,095.68, 1,917,627,207.12 and 787,011,336 is: 1,085,811,405.62
Step by Step Solution
- Step 1: Write the proportion equation
1,389,923,095.68 : 1,917,627,207.12 = 787,011,336 : x - Step 2: Convert to fraction form
1,389,923,095.68/1,917,627,207.12 = 787,011,336/x - Step 3: Cross multiply
1,389,923,095.68x = 1,917,627,207.12 × 787,011,336 - Step 4: Simplify right side
1,389,923,095.68x = 1,509,194,350,225,459,712 - Step 5: Solve for x
x = 1,509,194,350,225,459,712/1,389,923,095.68 - Step 6: Final answer
x = 1,085,811,405.62
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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.