Finding the Fourth Proportional to 612,458.19, 916,890.78 and 429,454.44
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Solution
The fourth proportional to 612,458.19, 916,890.78 and 429,454.44 is: 642,921.95
Step by Step Solution
- Step 1: Write the proportion equation
612,458.19 : 916,890.78 = 429,454.44 : x - Step 2: Convert to fraction form
612,458.19/916,890.78 = 429,454.44/x - Step 3: Cross multiply
612,458.19x = 916,890.78 × 429,454.44 - Step 4: Simplify right side
612,458.19x = 393,762,816,466.06 - Step 5: Solve for x
x = 393,762,816,466.06/612,458.19 - Step 6: Final answer
x = 642,921.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.