Finding the Fourth Proportional to 1,069,140.48, 1,475,413.74 and 639,420.54
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Solution
The fourth proportional to 1,069,140.48, 1,475,413.74 and 639,420.54 is: 882,400.27
Step by Step Solution
- Step 1: Write the proportion equation
1,069,140.48 : 1,475,413.74 = 639,420.54 : x - Step 2: Convert to fraction form
1,069,140.48/1,475,413.74 = 639,420.54/x - Step 3: Cross multiply
1,069,140.48x = 1,475,413.74 × 639,420.54 - Step 4: Simplify right side
1,069,140.48x = 943,409,850,354.22 - Step 5: Solve for x
x = 943,409,850,354.22/1,069,140.48 - Step 6: Final answer
x = 882,400.27
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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.