Finding the Fourth Proportional to 644,722.70, 889,721.60 and 403,146.68
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Solution
The fourth proportional to 644,722.70, 889,721.60 and 403,146.68 is: 556,345.09
Step by Step Solution
- Step 1: Write the proportion equation
644,722.70 : 889,721.60 = 403,146.68 : x - Step 2: Convert to fraction form
644,722.70/889,721.60 = 403,146.68/x - Step 3: Cross multiply
644,722.70x = 889,721.60 × 403,146.68 - Step 4: Simplify right side
644,722.70x = 358,688,309,164.29 - Step 5: Solve for x
x = 358,688,309,164.29/644,722.70 - Step 6: Final answer
x = 556,345.09
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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.