Finding the Fourth Proportional to 399,931.12, 551,919.68 and 218,655.12
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Solution
The fourth proportional to 399,931.12, 551,919.68 and 218,655.12 is: 301,752.12
Step by Step Solution
- Step 1: Write the proportion equation
399,931.12 : 551,919.68 = 218,655.12 : x - Step 2: Convert to fraction form
399,931.12/551,919.68 = 218,655.12/x - Step 3: Cross multiply
399,931.12x = 551,919.68 × 218,655.12 - Step 4: Simplify right side
399,931.12x = 120,680,063,860.76 - Step 5: Solve for x
x = 120,680,063,860.76/399,931.12 - Step 6: Final answer
x = 301,752.12
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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.