Finding the Fourth Proportional to 291,398.71, 436,987.33 and 139,439.79
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Solution
The fourth proportional to 291,398.71, 436,987.33 and 139,439.79 is: 209,106.70
Step by Step Solution
- Step 1: Write the proportion equation
291,398.71 : 436,987.33 = 139,439.79 : x - Step 2: Convert to fraction form
291,398.71/436,987.33 = 139,439.79/x - Step 3: Cross multiply
291,398.71x = 436,987.33 × 139,439.79 - Step 4: Simplify right side
291,398.71x = 60,933,421,527.86 - Step 5: Solve for x
x = 60,933,421,527.86/291,398.71 - Step 6: Final answer
x = 209,106.70
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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.