Finding the Fourth Proportional to 665,915,120.64, 918,964,832.58 and 368,578,014.57
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Solution
The fourth proportional to 665,915,120.64, 918,964,832.58 and 368,578,014.57 is: 508,638,748.32
Step by Step Solution
- Step 1: Write the proportion equation
665,915,120.64 : 918,964,832.58 = 368,578,014.57 : x - Step 2: Convert to fraction form
665,915,120.64/918,964,832.58 = 368,578,014.57/x - Step 3: Cross multiply
665,915,120.64x = 918,964,832.58 × 368,578,014.57 - Step 4: Simplify right side
665,915,120.64x = 338,710,233,451,988,864 - Step 5: Solve for x
x = 338,710,233,451,988,864/665,915,120.64 - Step 6: Final answer
x = 508,638,748.32
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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.