Finding the Fourth Proportional to 644,718.47, 889,435.51 and 402,580.67
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Solution
The fourth proportional to 644,718.47, 889,435.51 and 402,580.67 is: 555,388.99
Step by Step Solution
- Step 1: Write the proportion equation
644,718.47 : 889,435.51 = 402,580.67 : x - Step 2: Convert to fraction form
644,718.47/889,435.51 = 402,580.67/x - Step 3: Cross multiply
644,718.47x = 889,435.51 × 402,580.67 - Step 4: Simplify right side
644,718.47x = 358,069,538,083.96 - Step 5: Solve for x
x = 358,069,538,083.96/644,718.47 - Step 6: Final answer
x = 555,388.99
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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.