Finding the Fourth Proportional to 1,220,346,071.80, 1,830,519,107.70 and 402,415,070.20
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Solution
The fourth proportional to 1,220,346,071.80, 1,830,519,107.70 and 402,415,070.20 is: 603,622,605.30
Step by Step Solution
- Step 1: Write the proportion equation
1,220,346,071.80 : 1,830,519,107.70 = 402,415,070.20 : x - Step 2: Convert to fraction form
1,220,346,071.80/1,830,519,107.70 = 402,415,070.20/x - Step 3: Cross multiply
1,220,346,071.80x = 1,830,519,107.70 × 402,415,070.20 - Step 4: Simplify right side
1,220,346,071.80x = 736,628,475,227,536,896 - Step 5: Solve for x
x = 736,628,475,227,536,896/1,220,346,071.80 - Step 6: Final answer
x = 603,622,605.30
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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.