Finding the Fourth Proportional to 312,931.44, 431,566.68 and 245,746.80
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Solution
The fourth proportional to 312,931.44, 431,566.68 and 245,746.80 is: 338,911.71
Step by Step Solution
- Step 1: Write the proportion equation
312,931.44 : 431,566.68 = 245,746.80 : x - Step 2: Convert to fraction form
312,931.44/431,566.68 = 245,746.80/x - Step 3: Cross multiply
312,931.44x = 431,566.68 × 245,746.80 - Step 4: Simplify right side
312,931.44x = 106,056,130,596.62 - Step 5: Solve for x
x = 106,056,130,596.62/312,931.44 - Step 6: Final answer
x = 338,911.71
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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.