Finding the Fourth Proportional to 1,278,749,779.44, 1,764,674,674.20 and 692,038,915.44
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Solution
The fourth proportional to 1,278,749,779.44, 1,764,674,674.20 and 692,038,915.44 is: 955,013,691.71
Step by Step Solution
- Step 1: Write the proportion equation
1,278,749,779.44 : 1,764,674,674.20 = 692,038,915.44 : x - Step 2: Convert to fraction form
1,278,749,779.44/1,764,674,674.20 = 692,038,915.44/x - Step 3: Cross multiply
1,278,749,779.44x = 1,764,674,674.20 × 692,038,915.44 - Step 4: Simplify right side
1,278,749,779.44x = 1,221,223,547,637,803,520 - Step 5: Solve for x
x = 1,221,223,547,637,803,520/1,278,749,779.44 - Step 6: Final answer
x = 955,013,691.71
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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.