Finding the Fourth Proportional to 991,155.78, 1,486,831.68 and 317,067.84
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Solution
The fourth proportional to 991,155.78, 1,486,831.68 and 317,067.84 is: 475,633.11
Step by Step Solution
- Step 1: Write the proportion equation
991,155.78 : 1,486,831.68 = 317,067.84 : x - Step 2: Convert to fraction form
991,155.78/1,486,831.68 = 317,067.84/x - Step 3: Cross multiply
991,155.78x = 1,486,831.68 × 317,067.84 - Step 4: Simplify right side
991,155.78x = 471,426,509,221.17 - Step 5: Solve for x
x = 471,426,509,221.17/991,155.78 - Step 6: Final answer
x = 475,633.11
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.