Finding the Fourth Proportional to 813,455.76, 1,219,376.07 and 386,240.70
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Solution
The fourth proportional to 813,455.76, 1,219,376.07 and 386,240.70 is: 578,977.60
Step by Step Solution
- Step 1: Write the proportion equation
813,455.76 : 1,219,376.07 = 386,240.70 : x - Step 2: Convert to fraction form
813,455.76/1,219,376.07 = 386,240.70/x - Step 3: Cross multiply
813,455.76x = 1,219,376.07 × 386,240.70 - Step 4: Simplify right side
813,455.76x = 470,972,666,840.05 - Step 5: Solve for x
x = 470,972,666,840.05/813,455.76 - Step 6: Final answer
x = 578,977.60
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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.