Finding the Fourth Proportional to 458,135.80, 687,203.70 and 205,415.80
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Solution
The fourth proportional to 458,135.80, 687,203.70 and 205,415.80 is: 308,123.70
Step by Step Solution
- Step 1: Write the proportion equation
458,135.80 : 687,203.70 = 205,415.80 : x - Step 2: Convert to fraction form
458,135.80/687,203.70 = 205,415.80/x - Step 3: Cross multiply
458,135.80x = 687,203.70 × 205,415.80 - Step 4: Simplify right side
458,135.80x = 141,162,497,798.46 - Step 5: Solve for x
x = 141,162,497,798.46/458,135.80 - Step 6: Final answer
x = 308,123.70
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1.5x scale
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.