Finding the Fourth Proportional to 720,652.80, 994,781.28 and 645,070.08
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Solution
The fourth proportional to 720,652.80, 994,781.28 and 645,070.08 is: 890,447.72
Step by Step Solution
- Step 1: Write the proportion equation
720,652.80 : 994,781.28 = 645,070.08 : x - Step 2: Convert to fraction form
720,652.80/994,781.28 = 645,070.08/x - Step 3: Cross multiply
720,652.80x = 994,781.28 × 645,070.08 - Step 4: Simplify right side
720,652.80x = 641,703,639,872.10 - Step 5: Solve for x
x = 641,703,639,872.10/720,652.80 - Step 6: Final answer
x = 890,447.72
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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.