Finding the Fourth Proportional to 752.60, 1,128.99 and 265.70
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Solution
The fourth proportional to 752.60, 1,128.99 and 265.70 is: 398.58
Step by Step Solution
- Step 1: Write the proportion equation
752.60 : 1,128.99 = 265.70 : x - Step 2: Convert to fraction form
752.60/1,128.99 = 265.70/x - Step 3: Cross multiply
752.60x = 1,128.99 × 265.70 - Step 4: Simplify right side
752.60x = 299,972.64 - Step 5: Solve for x
x = 299,972.64/752.60 - Step 6: Final answer
x = 398.58
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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.