Finding the Fourth Proportional to 420.74, 631.10 and 372.54
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Solution
The fourth proportional to 420.74, 631.10 and 372.54 is: 558.80
Step by Step Solution
- Step 1: Write the proportion equation
420.74 : 631.10 = 372.54 : x - Step 2: Convert to fraction form
420.74/631.10 = 372.54/x - Step 3: Cross multiply
420.74x = 631.10 × 372.54 - Step 4: Simplify right side
420.74x = 235,109.99 - Step 5: Solve for x
x = 235,109.99/420.74 - Step 6: Final answer
x = 558.80
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.