Finding the Fourth Proportional to 644,346.80, 889,146.42 and 372,432.23
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Solution
The fourth proportional to 644,346.80, 889,146.42 and 372,432.23 is: 513,926.32
Step by Step Solution
- Step 1: Write the proportion equation
644,346.80 : 889,146.42 = 372,432.23 : x - Step 2: Convert to fraction form
644,346.80/889,146.42 = 372,432.23/x - Step 3: Cross multiply
644,346.80x = 889,146.42 × 372,432.23 - Step 4: Simplify right side
644,346.80x = 331,146,781,489.06 - Step 5: Solve for x
x = 331,146,781,489.06/644,346.80 - Step 6: Final answer
x = 513,926.32
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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.