Finding the Fourth Proportional to 420,590.28, 580,416.95 and 239,302.21
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Solution
The fourth proportional to 420,590.28, 580,416.95 and 239,302.21 is: 330,238.39
Step by Step Solution
- Step 1: Write the proportion equation
420,590.28 : 580,416.95 = 239,302.21 : x - Step 2: Convert to fraction form
420,590.28/580,416.95 = 239,302.21/x - Step 3: Cross multiply
420,590.28x = 580,416.95 × 239,302.21 - Step 4: Simplify right side
420,590.28x = 138,895,058,856.46 - Step 5: Solve for x
x = 138,895,058,856.46/420,590.28 - Step 6: Final answer
x = 330,238.39
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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.