Finding the Fourth Proportional to 613,291,270.30, 919,936,905.45 and 285,657,893.80
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Solution
The fourth proportional to 613,291,270.30, 919,936,905.45 and 285,657,893.80 is: 428,486,840.70
Step by Step Solution
- Step 1: Write the proportion equation
613,291,270.30 : 919,936,905.45 = 285,657,893.80 : x - Step 2: Convert to fraction form
613,291,270.30/919,936,905.45 = 285,657,893.80/x - Step 3: Cross multiply
613,291,270.30x = 919,936,905.45 × 285,657,893.80 - Step 4: Simplify right side
613,291,270.30x = 262,787,238,839,736,768 - Step 5: Solve for x
x = 262,787,238,839,736,768/613,291,270.30 - Step 6: Final answer
x = 428,486,840.70
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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.