Finding the Fourth Proportional to 1,388,109.19, 1,915,579.86 and 776,263.14
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Solution
The fourth proportional to 1,388,109.19, 1,915,579.86 and 776,263.14 is: 1,071,237.08
Step by Step Solution
- Step 1: Write the proportion equation
1,388,109.19 : 1,915,579.86 = 776,263.14 : x - Step 2: Convert to fraction form
1,388,109.19/1,915,579.86 = 776,263.14/x - Step 3: Cross multiply
1,388,109.19x = 1,915,579.86 × 776,263.14 - Step 4: Simplify right side
1,388,109.19x = 1,486,994,037,044.36 - Step 5: Solve for x
x = 1,486,994,037,044.36/1,388,109.19 - Step 6: Final answer
x = 1,071,237.08
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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.