Finding the Fourth Proportional to 415,972.80, 623,959.20 and 205,643.20
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Solution
The fourth proportional to 415,972.80, 623,959.20 and 205,643.20 is: 308,464.80
Step by Step Solution
- Step 1: Write the proportion equation
415,972.80 : 623,959.20 = 205,643.20 : x - Step 2: Convert to fraction form
415,972.80/623,959.20 = 205,643.20/x - Step 3: Cross multiply
415,972.80x = 623,959.20 × 205,643.20 - Step 4: Simplify right side
415,972.80x = 128,312,966,557.44 - Step 5: Solve for x
x = 128,312,966,557.44/415,972.80 - Step 6: Final answer
x = 308,464.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.