Finding the Fourth Proportional to 420,300.08, 579,990.34 and 239,056.10
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Solution
The fourth proportional to 420,300.08, 579,990.34 and 239,056.10 is: 329,883.90
Step by Step Solution
- Step 1: Write the proportion equation
420,300.08 : 579,990.34 = 239,056.10 : x - Step 2: Convert to fraction form
420,300.08/579,990.34 = 239,056.10/x - Step 3: Cross multiply
420,300.08x = 579,990.34 × 239,056.10 - Step 4: Simplify right side
420,300.08x = 138,650,228,718.07 - Step 5: Solve for x
x = 138,650,228,718.07/420,300.08 - Step 6: Final answer
x = 329,883.90
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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.