Finding the Fourth Proportional to 1,388,437.30, 1,916,220.92 and 776,624.05
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Solution
The fourth proportional to 1,388,437.30, 1,916,220.92 and 776,624.05 is: 1,071,840.45
Step by Step Solution
- Step 1: Write the proportion equation
1,388,437.30 : 1,916,220.92 = 776,624.05 : x - Step 2: Convert to fraction form
1,388,437.30/1,916,220.92 = 776,624.05/x - Step 3: Cross multiply
1,388,437.30x = 1,916,220.92 × 776,624.05 - Step 4: Simplify right side
1,388,437.30x = 1,488,183,256,650.05 - Step 5: Solve for x
x = 1,488,183,256,650.05/1,388,437.30 - Step 6: Final answer
x = 1,071,840.45
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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.