Finding the Fourth Proportional to 420,539.13, 630,162.95 and 285,427.71
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Solution
The fourth proportional to 420,539.13, 630,162.95 and 285,427.71 is: 427,703.28
Step by Step Solution
- Step 1: Write the proportion equation
420,539.13 : 630,162.95 = 285,427.71 : x - Step 2: Convert to fraction form
420,539.13/630,162.95 = 285,427.71/x - Step 3: Cross multiply
420,539.13x = 630,162.95 × 285,427.71 - Step 4: Simplify right side
420,539.13x = 179,865,966,318.21 - Step 5: Solve for x
x = 179,865,966,318.21/420,539.13 - Step 6: Final answer
x = 427,703.28
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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.