Finding the Fourth Proportional to 1,438,398,878.92, 1,984,993,903.38 and 778,356,239.56
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Solution
The fourth proportional to 1,438,398,878.92, 1,984,993,903.38 and 778,356,239.56 is: 1,074,133,477.73
Step by Step Solution
- Step 1: Write the proportion equation
1,438,398,878.92 : 1,984,993,903.38 = 778,356,239.56 : x - Step 2: Convert to fraction form
1,438,398,878.92/1,984,993,903.38 = 778,356,239.56/x - Step 3: Cross multiply
1,438,398,878.92x = 1,984,993,903.38 × 778,356,239.56 - Step 4: Simplify right side
1,438,398,878.92x = 1,545,032,390,184,382,720 - Step 5: Solve for x
x = 1,545,032,390,184,382,720/1,438,398,878.92 - Step 6: Final answer
x = 1,074,133,477.73
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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.