Finding the Fourth Proportional to 420.99, 631.35 and 147.02
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Solution
The fourth proportional to 420.99, 631.35 and 147.02 is: 220.48
Step by Step Solution
- Step 1: Write the proportion equation
420.99 : 631.35 = 147.02 : x - Step 2: Convert to fraction form
420.99/631.35 = 147.02/x - Step 3: Cross multiply
420.99x = 631.35 × 147.02 - Step 4: Simplify right side
420.99x = 92,821.08 - Step 5: Solve for x
x = 92,821.08/420.99 - Step 6: Final answer
x = 220.48
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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.