Finding the Fourth Proportional to 1,388,854.64, 1,916,693.84 and 776,970.90
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Solution
The fourth proportional to 1,388,854.64, 1,916,693.84 and 776,970.90 is: 1,072,261.48
Step by Step Solution
- Step 1: Write the proportion equation
1,388,854.64 : 1,916,693.84 = 776,970.90 : x - Step 2: Convert to fraction form
1,388,854.64/1,916,693.84 = 776,970.90/x - Step 3: Cross multiply
1,388,854.64x = 1,916,693.84 × 776,970.90 - Step 4: Simplify right side
1,388,854.64x = 1,489,215,339,831.68 - Step 5: Solve for x
x = 1,489,215,339,831.68/1,388,854.64 - Step 6: Final answer
x = 1,072,261.48
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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.