Finding the Fourth Proportional to 7,716,420.68, 10,649,139.20 and 4,278,661.71
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Solution
The fourth proportional to 7,716,420.68, 10,649,139.20 and 4,278,661.71 is: 5,904,818.57
Step by Step Solution
- Step 1: Write the proportion equation
7,716,420.68 : 10,649,139.20 = 4,278,661.71 : x - Step 2: Convert to fraction form
7,716,420.68/10,649,139.20 = 4,278,661.71/x - Step 3: Cross multiply
7,716,420.68x = 10,649,139.20 × 4,278,661.71 - Step 4: Simplify right side
7,716,420.68x = 45,564,064,118,106.73 - Step 5: Solve for x
x = 45,564,064,118,106.73/7,716,420.68 - Step 6: Final answer
x = 5,904,818.57
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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.