Finding the Fourth Proportional to 644,325.76, 889,140.77 and 386,345.11
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Solution
The fourth proportional to 644,325.76, 889,140.77 and 386,345.11 is: 533,138.99
Step by Step Solution
- Step 1: Write the proportion equation
644,325.76 : 889,140.77 = 386,345.11 : x - Step 2: Convert to fraction form
644,325.76/889,140.77 = 386,345.11/x - Step 3: Cross multiply
644,325.76x = 889,140.77 × 386,345.11 - Step 4: Simplify right side
644,325.76x = 343,515,184,888.03 - Step 5: Solve for x
x = 343,515,184,888.03/644,325.76 - Step 6: Final answer
x = 533,138.99
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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.