Finding the Fourth Proportional to 670.30, 1,011.44 and 644.99
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Solution
The fourth proportional to 670.30, 1,011.44 and 644.99 is: 973.25
Step by Step Solution
- Step 1: Write the proportion equation
670.30 : 1,011.44 = 644.99 : x - Step 2: Convert to fraction form
670.30/1,011.44 = 644.99/x - Step 3: Cross multiply
670.30x = 1,011.44 × 644.99 - Step 4: Simplify right side
670.30x = 652,365.24 - Step 5: Solve for x
x = 652,365.24/670.30 - Step 6: Final answer
x = 973.25
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.