Finding the Fourth Proportional to 1,244,208,081.70, 1,866,312,122.55 and 426,048,465.70
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Solution
The fourth proportional to 1,244,208,081.70, 1,866,312,122.55 and 426,048,465.70 is: 639,072,698.55
Step by Step Solution
- Step 1: Write the proportion equation
1,244,208,081.70 : 1,866,312,122.55 = 426,048,465.70 : x - Step 2: Convert to fraction form
1,244,208,081.70/1,866,312,122.55 = 426,048,465.70/x - Step 3: Cross multiply
1,244,208,081.70x = 1,866,312,122.55 × 426,048,465.70 - Step 4: Simplify right side
1,244,208,081.70x = 795,139,416,329,737,856 - Step 5: Solve for x
x = 795,139,416,329,737,856/1,244,208,081.70 - Step 6: Final answer
x = 639,072,698.55
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Double scale
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Similar ratio
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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.