Finding the Fourth Proportional to 688,078.78, 949,542.12 and 386,270.62
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Solution
The fourth proportional to 688,078.78, 949,542.12 and 386,270.62 is: 533,049.75
Step by Step Solution
- Step 1: Write the proportion equation
688,078.78 : 949,542.12 = 386,270.62 : x - Step 2: Convert to fraction form
688,078.78/949,542.12 = 386,270.62/x - Step 3: Cross multiply
688,078.78x = 949,542.12 × 386,270.62 - Step 4: Simplify right side
688,078.78x = 366,780,223,408.51 - Step 5: Solve for x
x = 366,780,223,408.51/688,078.78 - Step 6: Final answer
x = 533,049.75
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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.