Finding the Fourth Proportional to 687,190.06, 948,290.16 and 381,263.19
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Solution
The fourth proportional to 687,190.06, 948,290.16 and 381,263.19 is: 526,125.38
Step by Step Solution
- Step 1: Write the proportion equation
687,190.06 : 948,290.16 = 381,263.19 : x - Step 2: Convert to fraction form
687,190.06/948,290.16 = 381,263.19/x - Step 3: Cross multiply
687,190.06x = 948,290.16 × 381,263.19 - Step 4: Simplify right side
687,190.06x = 361,548,131,447.21 - Step 5: Solve for x
x = 361,548,131,447.21/687,190.06 - Step 6: Final answer
x = 526,125.38
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Double scale
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1.5x scale
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.