Finding the Fourth Proportional to 641,866.96, 885,804.08 and 355,387.05
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Solution
The fourth proportional to 641,866.96, 885,804.08 and 355,387.05 is: 490,449.45
Step by Step Solution
- Step 1: Write the proportion equation
641,866.96 : 885,804.08 = 355,387.05 : x - Step 2: Convert to fraction form
641,866.96/885,804.08 = 355,387.05/x - Step 3: Cross multiply
641,866.96x = 885,804.08 × 355,387.05 - Step 4: Simplify right side
641,866.96x = 314,803,298,869.16 - Step 5: Solve for x
x = 314,803,298,869.16/641,866.96 - Step 6: Final answer
x = 490,449.45
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1.5x scale
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.