Finding the Fourth Proportional to 766,584,885.60, 1,149,877,328.40 and 421,405,135.20
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Solution
The fourth proportional to 766,584,885.60, 1,149,877,328.40 and 421,405,135.20 is: 632,107,702.80
Step by Step Solution
- Step 1: Write the proportion equation
766,584,885.60 : 1,149,877,328.40 = 421,405,135.20 : x - Step 2: Convert to fraction form
766,584,885.60/1,149,877,328.40 = 421,405,135.20/x - Step 3: Cross multiply
766,584,885.60x = 1,149,877,328.40 × 421,405,135.20 - Step 4: Simplify right side
766,584,885.60x = 484,564,211,037,816,832 - Step 5: Solve for x
x = 484,564,211,037,816,832/766,584,885.60 - Step 6: Final answer
x = 632,107,702.80
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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.