Finding the Fourth Proportional to 1,244,208,319.20, 1,866,312,478.80 and 426,048,703.20
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Solution
The fourth proportional to 1,244,208,319.20, 1,866,312,478.80 and 426,048,703.20 is: 639,073,054.80
Step by Step Solution
- Step 1: Write the proportion equation
1,244,208,319.20 : 1,866,312,478.80 = 426,048,703.20 : x - Step 2: Convert to fraction form
1,244,208,319.20/1,866,312,478.80 = 426,048,703.20/x - Step 3: Cross multiply
1,244,208,319.20x = 1,866,312,478.80 × 426,048,703.20 - Step 4: Simplify right side
1,244,208,319.20x = 795,140,011,358,717,440 - Step 5: Solve for x
x = 795,140,011,358,717,440/1,244,208,319.20 - Step 6: Final answer
x = 639,073,054.80
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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.