Finding the Fourth Proportional to 489,726.80, 734,590.20 and 290,661.20
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Solution
The fourth proportional to 489,726.80, 734,590.20 and 290,661.20 is: 435,991.80
Step by Step Solution
- Step 1: Write the proportion equation
489,726.80 : 734,590.20 = 290,661.20 : x - Step 2: Convert to fraction form
489,726.80/734,590.20 = 290,661.20/x - Step 3: Cross multiply
489,726.80x = 734,590.20 × 290,661.20 - Step 4: Simplify right side
489,726.80x = 213,516,869,040.24 - Step 5: Solve for x
x = 213,516,869,040.24/489,726.80 - Step 6: Final answer
x = 435,991.80
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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.