Finding the Fourth Proportional to 420,612.87, 580,478.88 and 239,332.44
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Solution
The fourth proportional to 420,612.87, 580,478.88 and 239,332.44 is: 330,297.61
Step by Step Solution
- Step 1: Write the proportion equation
420,612.87 : 580,478.88 = 239,332.44 : x - Step 2: Convert to fraction form
420,612.87/580,478.88 = 239,332.44/x - Step 3: Cross multiply
420,612.87x = 580,478.88 × 239,332.44 - Step 4: Simplify right side
420,612.87x = 138,927,426,718.87 - Step 5: Solve for x
x = 138,927,426,718.87/420,612.87 - Step 6: Final answer
x = 330,297.61
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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.