Finding the Fourth Proportional to 643,210.68, 887,673.42 and 356,742.84
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Solution
The fourth proportional to 643,210.68, 887,673.42 and 356,742.84 is: 492,328.79
Step by Step Solution
- Step 1: Write the proportion equation
643,210.68 : 887,673.42 = 356,742.84 : x - Step 2: Convert to fraction form
643,210.68/887,673.42 = 356,742.84/x - Step 3: Cross multiply
643,210.68x = 887,673.42 × 356,742.84 - Step 4: Simplify right side
643,210.68x = 316,671,136,843.31 - Step 5: Solve for x
x = 316,671,136,843.31/643,210.68 - Step 6: Final answer
x = 492,328.79
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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.