Finding the Fourth Proportional to 645,621.70, 968,432.55 and 393,679.30
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Solution
The fourth proportional to 645,621.70, 968,432.55 and 393,679.30 is: 590,518.95
Step by Step Solution
- Step 1: Write the proportion equation
645,621.70 : 968,432.55 = 393,679.30 : x - Step 2: Convert to fraction form
645,621.70/968,432.55 = 393,679.30/x - Step 3: Cross multiply
645,621.70x = 968,432.55 × 393,679.30 - Step 4: Simplify right side
645,621.70x = 381,251,848,381.22 - Step 5: Solve for x
x = 381,251,848,381.22/645,621.70 - Step 6: Final answer
x = 590,518.95
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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.