Finding the Fourth Proportional to 1,288,308.21, 1,931,862.60 and 478,128.18
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Solution
The fourth proportional to 1,288,308.21, 1,931,862.60 and 478,128.18 is: 716,969.70
Step by Step Solution
- Step 1: Write the proportion equation
1,288,308.21 : 1,931,862.60 = 478,128.18 : x - Step 2: Convert to fraction form
1,288,308.21/1,931,862.60 = 478,128.18/x - Step 3: Cross multiply
1,288,308.21x = 1,931,862.60 × 478,128.18 - Step 4: Simplify right side
1,288,308.21x = 923,677,948,948.07 - Step 5: Solve for x
x = 923,677,948,948.07/1,288,308.21 - Step 6: Final answer
x = 716,969.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.