Finding the Fourth Proportional to 391,873.13, 589,138.44 and 312,919.70
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Solution
The fourth proportional to 391,873.13, 589,138.44 and 312,919.70 is: 470,440.58
Step by Step Solution
- Step 1: Write the proportion equation
391,873.13 : 589,138.44 = 312,919.70 : x - Step 2: Convert to fraction form
391,873.13/589,138.44 = 312,919.70/x - Step 3: Cross multiply
391,873.13x = 589,138.44 × 312,919.70 - Step 4: Simplify right side
391,873.13x = 184,353,020,957.58 - Step 5: Solve for x
x = 184,353,020,957.58/391,873.13 - Step 6: Final answer
x = 470,440.58
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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.