Finding the Fourth Proportional to 717,673,890.96, 990,390,349.08 and 387,649,029.36
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Solution
The fourth proportional to 717,673,890.96, 990,390,349.08 and 387,649,029.36 is: 534,955,865.53
Step by Step Solution
- Step 1: Write the proportion equation
717,673,890.96 : 990,390,349.08 = 387,649,029.36 : x - Step 2: Convert to fraction form
717,673,890.96/990,390,349.08 = 387,649,029.36/x - Step 3: Cross multiply
717,673,890.96x = 990,390,349.08 × 387,649,029.36 - Step 4: Simplify right side
717,673,890.96x = 383,923,857,508,373,568 - Step 5: Solve for x
x = 383,923,857,508,373,568/717,673,890.96 - Step 6: Final answer
x = 534,955,865.53
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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.