Finding the Fourth Proportional to 1,318,963,118.81, 1,820,086,319 and 724,243,438.94
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Solution
The fourth proportional to 1,318,963,118.81, 1,820,086,319 and 724,243,438.94 is: 999,410,488.46
Step by Step Solution
- Step 1: Write the proportion equation
1,318,963,118.81 : 1,820,086,319 = 724,243,438.94 : x - Step 2: Convert to fraction form
1,318,963,118.81/1,820,086,319 = 724,243,438.94/x - Step 3: Cross multiply
1,318,963,118.81x = 1,820,086,319 × 724,243,438.94 - Step 4: Simplify right side
1,318,963,118.81x = 1,318,185,574,831,105,280 - Step 5: Solve for x
x = 1,318,185,574,831,105,280/1,318,963,118.81 - Step 6: Final answer
x = 999,410,488.46
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.