Finding the Fourth Proportional to 663,285.78, 915,366.82 and 372,988.70
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Solution
The fourth proportional to 663,285.78, 915,366.82 and 372,988.70 is: 514,742.65
Step by Step Solution
- Step 1: Write the proportion equation
663,285.78 : 915,366.82 = 372,988.70 : x - Step 2: Convert to fraction form
663,285.78/915,366.82 = 372,988.70/x - Step 3: Cross multiply
663,285.78x = 915,366.82 × 372,988.70 - Step 4: Simplify right side
663,285.78x = 341,421,480,214.93 - Step 5: Solve for x
x = 341,421,480,214.93/663,285.78 - Step 6: Final answer
x = 514,742.65
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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.