Finding the Fourth Proportional to 817,697.70, 1,128,411.41 and 455,121.65
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Solution
The fourth proportional to 817,697.70, 1,128,411.41 and 455,121.65 is: 628,061.52
Step by Step Solution
- Step 1: Write the proportion equation
817,697.70 : 1,128,411.41 = 455,121.65 : x - Step 2: Convert to fraction form
817,697.70/1,128,411.41 = 455,121.65/x - Step 3: Cross multiply
817,697.70x = 1,128,411.41 × 455,121.65 - Step 4: Simplify right side
817,697.70x = 513,564,463,343.45 - Step 5: Solve for x
x = 513,564,463,343.45/817,697.70 - Step 6: Final answer
x = 628,061.52
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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.