Finding the Fourth Proportional to 912, 1,258.58 and 518.88
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Solution
The fourth proportional to 912, 1,258.58 and 518.88 is: 716.07
Step by Step Solution
- Step 1: Write the proportion equation
912 : 1,258.58 = 518.88 : x - Step 2: Convert to fraction form
912/1,258.58 = 518.88/x - Step 3: Cross multiply
912x = 1,258.58 × 518.88 - Step 4: Simplify right side
912x = 653,051.99 - Step 5: Solve for x
x = 653,051.99/912 - Step 6: Final answer
x = 716.07
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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.