Finding the Fourth Proportional to 1,287,900.95, 1,931,441.18 and 423,135.09
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Solution
The fourth proportional to 1,287,900.95, 1,931,441.18 and 423,135.09 is: 634,567.85
Step by Step Solution
- Step 1: Write the proportion equation
1,287,900.95 : 1,931,441.18 = 423,135.09 : x - Step 2: Convert to fraction form
1,287,900.95/1,931,441.18 = 423,135.09/x - Step 3: Cross multiply
1,287,900.95x = 1,931,441.18 × 423,135.09 - Step 4: Simplify right side
1,287,900.95x = 817,260,535,413.33 - Step 5: Solve for x
x = 817,260,535,413.33/1,287,900.95 - Step 6: Final answer
x = 634,567.85
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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.