Finding the Fourth Proportional to 398,439.21, 550,384.58 and 318,427.53
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Solution
The fourth proportional to 398,439.21, 550,384.58 and 318,427.53 is: 439,860.33
Step by Step Solution
- Step 1: Write the proportion equation
398,439.21 : 550,384.58 = 318,427.53 : x - Step 2: Convert to fraction form
398,439.21/550,384.58 = 318,427.53/x - Step 3: Cross multiply
398,439.21x = 550,384.58 × 318,427.53 - Step 4: Simplify right side
398,439.21x = 175,257,600,767.35 - Step 5: Solve for x
x = 175,257,600,767.35/398,439.21 - Step 6: Final answer
x = 439,860.33
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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.