Finding the Fourth Proportional to 455.91, 628.99 and 278.80
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Solution
The fourth proportional to 455.91, 628.99 and 278.80 is: 384.64
Step by Step Solution
- Step 1: Write the proportion equation
455.91 : 628.99 = 278.80 : x - Step 2: Convert to fraction form
455.91/628.99 = 278.80/x - Step 3: Cross multiply
455.91x = 628.99 × 278.80 - Step 4: Simplify right side
455.91x = 175,362.41 - Step 5: Solve for x
x = 175,362.41/455.91 - Step 6: Final answer
x = 384.64
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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.