Finding the Fourth Proportional to 1,252,457,875.98, 1,728,692,889.66 and 716,919,984.81
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Solution
The fourth proportional to 1,252,457,875.98, 1,728,692,889.66 and 716,919,984.81 is: 989,521,886.50
Step by Step Solution
- Step 1: Write the proportion equation
1,252,457,875.98 : 1,728,692,889.66 = 716,919,984.81 : x - Step 2: Convert to fraction form
1,252,457,875.98/1,728,692,889.66 = 716,919,984.81/x - Step 3: Cross multiply
1,252,457,875.98x = 1,728,692,889.66 × 716,919,984.81 - Step 4: Simplify right side
1,252,457,875.98x = 1,239,334,480,196,202,240 - Step 5: Solve for x
x = 1,239,334,480,196,202,240/1,252,457,875.98 - Step 6: Final answer
x = 989,521,886.50
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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.