Finding the Fourth Proportional to 387,621.86, 581,432.80 and 121,403.21
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Solution
The fourth proportional to 387,621.86, 581,432.80 and 121,403.21 is: 182,104.82
Step by Step Solution
- Step 1: Write the proportion equation
387,621.86 : 581,432.80 = 121,403.21 : x - Step 2: Convert to fraction form
387,621.86/581,432.80 = 121,403.21/x - Step 3: Cross multiply
387,621.86x = 581,432.80 × 121,403.21 - Step 4: Simplify right side
387,621.86x = 70,587,808,319.29 - Step 5: Solve for x
x = 70,587,808,319.29/387,621.86 - Step 6: Final answer
x = 182,104.82
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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.