Finding the Fourth Proportional to 420,431.31, 580,177.08 and 239,117.67
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Solution
The fourth proportional to 420,431.31, 580,177.08 and 239,117.67 is: 329,972.07
Step by Step Solution
- Step 1: Write the proportion equation
420,431.31 : 580,177.08 = 239,117.67 : x - Step 2: Convert to fraction form
420,431.31/580,177.08 = 239,117.67/x - Step 3: Cross multiply
420,431.31x = 580,177.08 × 239,117.67 - Step 4: Simplify right side
420,431.31x = 138,730,591,557.00 - Step 5: Solve for x
x = 138,730,591,557.00/420,431.31 - Step 6: Final answer
x = 329,972.07
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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.