Finding the Fourth Proportional to 7,078,630.21, 9,768,228.35 and 4,178,955.15
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Solution
The fourth proportional to 7,078,630.21, 9,768,228.35 and 4,178,955.15 is: 5,766,792.01
Step by Step Solution
- Step 1: Write the proportion equation
7,078,630.21 : 9,768,228.35 = 4,178,955.15 : x - Step 2: Convert to fraction form
7,078,630.21/9,768,228.35 = 4,178,955.15/x - Step 3: Cross multiply
7,078,630.21x = 9,768,228.35 × 4,178,955.15 - Step 4: Simplify right side
7,078,630.21x = 40,820,988,148,713.73 - Step 5: Solve for x
x = 40,820,988,148,713.73/7,078,630.21 - Step 6: Final answer
x = 5,766,792.01
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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.