Finding the Fourth Proportional to 1,222,208,639.99, 1,686,688,663.00 and 686,454,716.81
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Solution
The fourth proportional to 1,222,208,639.99, 1,686,688,663.00 and 686,454,716.81 is: 947,330,390.75
Step by Step Solution
- Step 1: Write the proportion equation
1,222,208,639.99 : 1,686,688,663.00 = 686,454,716.81 : x - Step 2: Convert to fraction form
1,222,208,639.99/1,686,688,663.00 = 686,454,716.81/x - Step 3: Cross multiply
1,222,208,639.99x = 1,686,688,663.00 × 686,454,716.81 - Step 4: Simplify right side
1,222,208,639.99x = 1,157,835,388,506,126,080 - Step 5: Solve for x
x = 1,157,835,388,506,126,080/1,222,208,639.99 - Step 6: Final answer
x = 947,330,390.75
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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.