Finding the Fourth Proportional to 485,909.70, 728,864.55 and 153,485.70
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Solution
The fourth proportional to 485,909.70, 728,864.55 and 153,485.70 is: 230,228.55
Step by Step Solution
- Step 1: Write the proportion equation
485,909.70 : 728,864.55 = 153,485.70 : x - Step 2: Convert to fraction form
485,909.70/728,864.55 = 153,485.70/x - Step 3: Cross multiply
485,909.70x = 728,864.55 × 153,485.70 - Step 4: Simplify right side
485,909.70x = 111,870,285,661.94 - Step 5: Solve for x
x = 111,870,285,661.94/485,909.70 - Step 6: Final answer
x = 230,228.55
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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.