Finding the Fourth Proportional to 685,990.08, 1,028,985.12 and 286,413.30
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Solution
The fourth proportional to 685,990.08, 1,028,985.12 and 286,413.30 is: 429,619.95
Step by Step Solution
- Step 1: Write the proportion equation
685,990.08 : 1,028,985.12 = 286,413.30 : x - Step 2: Convert to fraction form
685,990.08/1,028,985.12 = 286,413.30/x - Step 3: Cross multiply
685,990.08x = 1,028,985.12 × 286,413.30 - Step 4: Simplify right side
685,990.08x = 294,715,023,870.10 - Step 5: Solve for x
x = 294,715,023,870.10/685,990.08 - Step 6: Final answer
x = 429,619.95
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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.