Finding the Fourth Proportional to 420.24, 630 and 203.70
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Solution
The fourth proportional to 420.24, 630 and 203.70 is: 305.38
Step by Step Solution
- Step 1: Write the proportion equation
420.24 : 630 = 203.70 : x - Step 2: Convert to fraction form
420.24/630 = 203.70/x - Step 3: Cross multiply
420.24x = 630 × 203.70 - Step 4: Simplify right side
420.24x = 128,331 - Step 5: Solve for x
x = 128,331/420.24 - Step 6: Final answer
x = 305.38
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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.