Finding the Fourth Proportional to 451,678.42, 621,751.80 and 390,396.70
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Solution
The fourth proportional to 451,678.42, 621,751.80 and 390,396.70 is: 537,395.28
Step by Step Solution
- Step 1: Write the proportion equation
451,678.42 : 621,751.80 = 390,396.70 : x - Step 2: Convert to fraction form
451,678.42/621,751.80 = 390,396.70/x - Step 3: Cross multiply
451,678.42x = 621,751.80 × 390,396.70 - Step 4: Simplify right side
451,678.42x = 242,729,850,939.06 - Step 5: Solve for x
x = 242,729,850,939.06/451,678.42 - Step 6: Final answer
x = 537,395.28
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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.