Finding the Fourth Proportional to 678,688.49, 1,018,163.97 and 257,931.56
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Solution
The fourth proportional to 678,688.49, 1,018,163.97 and 257,931.56 is: 386,947.22
Step by Step Solution
- Step 1: Write the proportion equation
678,688.49 : 1,018,163.97 = 257,931.56 : x - Step 2: Convert to fraction form
678,688.49/1,018,163.97 = 257,931.56/x - Step 3: Cross multiply
678,688.49x = 1,018,163.97 × 257,931.56 - Step 4: Simplify right side
678,688.49x = 262,616,623,663.30 - Step 5: Solve for x
x = 262,616,623,663.30/678,688.49 - Step 6: Final answer
x = 386,947.22
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.