Finding the Fourth Proportional to 3,878,128.98, 5,817,459.15 and 1,318,302.18
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Solution
The fourth proportional to 3,878,128.98, 5,817,459.15 and 1,318,302.18 is: 1,977,543.58
Step by Step Solution
- Step 1: Write the proportion equation
3,878,128.98 : 5,817,459.15 = 1,318,302.18 : x - Step 2: Convert to fraction form
3,878,128.98/5,817,459.15 = 1,318,302.18/x - Step 3: Cross multiply
3,878,128.98x = 5,817,459.15 × 1,318,302.18 - Step 4: Simplify right side
3,878,128.98x = 7,669,169,079,505.95 - Step 5: Solve for x
x = 7,669,169,079,505.95/3,878,128.98 - Step 6: Final answer
x = 1,977,543.58
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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.