Finding the Fourth Proportional to 1,295,918,287.84, 1,787,708,390.63 and 787,145,613.01
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Solution
The fourth proportional to 1,295,918,287.84, 1,787,708,390.63 and 787,145,613.01 is: 1,085,860,760.07
Step by Step Solution
- Step 1: Write the proportion equation
1,295,918,287.84 : 1,787,708,390.63 = 787,145,613.01 : x - Step 2: Convert to fraction form
1,295,918,287.84/1,787,708,390.63 = 787,145,613.01/x - Step 3: Cross multiply
1,295,918,287.84x = 1,787,708,390.63 × 787,145,613.01 - Step 4: Simplify right side
1,295,918,287.84x = 1,407,186,817,025,571,840 - Step 5: Solve for x
x = 1,407,186,817,025,571,840/1,295,918,287.84 - Step 6: Final answer
x = 1,085,860,760.07
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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.