Finding the Fourth Proportional to 1,617,965,809.81, 2,232,157,497.70 and 939,667,289.74
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Solution
The fourth proportional to 1,617,965,809.81, 2,232,157,497.70 and 939,667,289.74 is: 1,296,371,884.63
Step by Step Solution
- Step 1: Write the proportion equation
1,617,965,809.81 : 2,232,157,497.70 = 939,667,289.74 : x - Step 2: Convert to fraction form
1,617,965,809.81/2,232,157,497.70 = 939,667,289.74/x - Step 3: Cross multiply
1,617,965,809.81x = 2,232,157,497.70 × 939,667,289.74 - Step 4: Simplify right side
1,617,965,809.81x = 2,097,485,386,136,579,072 - Step 5: Solve for x
x = 2,097,485,386,136,579,072/1,617,965,809.81 - Step 6: Final answer
x = 1,296,371,884.63
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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.