Finding the Fourth Proportional to 1,217,282,650, 1,679,708,339.11 and 681,463,655.66
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Solution
The fourth proportional to 1,217,282,650, 1,679,708,339.11 and 681,463,655.66 is: 940,340,507.78
Step by Step Solution
- Step 1: Write the proportion equation
1,217,282,650 : 1,679,708,339.11 = 681,463,655.66 : x - Step 2: Convert to fraction form
1,217,282,650/1,679,708,339.11 = 681,463,655.66/x - Step 3: Cross multiply
1,217,282,650x = 1,679,708,339.11 × 681,463,655.66 - Step 4: Simplify right side
1,217,282,650x = 1,144,660,185,212,487,424 - Step 5: Solve for x
x = 1,144,660,185,212,487,424/1,217,282,650 - Step 6: Final answer
x = 940,340,507.78
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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.