Finding the Fourth Proportional to 420,334.10, 580,073.85 and 239,072.12
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Solution
The fourth proportional to 420,334.10, 580,073.85 and 239,072.12 is: 329,926.80
Step by Step Solution
- Step 1: Write the proportion equation
420,334.10 : 580,073.85 = 239,072.12 : x - Step 2: Convert to fraction form
420,334.10/580,073.85 = 239,072.12/x - Step 3: Cross multiply
420,334.10x = 580,073.85 × 239,072.12 - Step 4: Simplify right side
420,334.10x = 138,679,486,526.25 - Step 5: Solve for x
x = 138,679,486,526.25/420,334.10 - Step 6: Final answer
x = 329,926.80
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1.5x scale
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.