Finding the Fourth Proportional to 420,740.80, 580,644.06 and 257,346.09
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Solution
The fourth proportional to 420,740.80, 580,644.06 and 257,346.09 is: 355,150.91
Step by Step Solution
- Step 1: Write the proportion equation
420,740.80 : 580,644.06 = 257,346.09 : x - Step 2: Convert to fraction form
420,740.80/580,644.06 = 257,346.09/x - Step 3: Cross multiply
420,740.80x = 580,644.06 × 257,346.09 - Step 4: Simplify right side
420,740.80x = 149,426,478,522.73 - Step 5: Solve for x
x = 149,426,478,522.73/420,740.80 - Step 6: Final answer
x = 355,150.91
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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.