Finding the Fourth Proportional to 420,830.21, 580,361.06 and 328,961.63
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Solution
The fourth proportional to 420,830.21, 580,361.06 and 328,961.63 is: 453,666.39
Step by Step Solution
- Step 1: Write the proportion equation
420,830.21 : 580,361.06 = 328,961.63 : x - Step 2: Convert to fraction form
420,830.21/580,361.06 = 328,961.63/x - Step 3: Cross multiply
420,830.21x = 580,361.06 × 328,961.63 - Step 4: Simplify right side
420,830.21x = 190,916,518,206.73 - Step 5: Solve for x
x = 190,916,518,206.73/420,830.21 - Step 6: Final answer
x = 453,666.39
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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.