Finding the Fourth Proportional to 644,288.41, 889,562.81 and 402,679.58
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Solution
The fourth proportional to 644,288.41, 889,562.81 and 402,679.58 is: 555,975.82
Step by Step Solution
- Step 1: Write the proportion equation
644,288.41 : 889,562.81 = 402,679.58 : x - Step 2: Convert to fraction form
644,288.41/889,562.81 = 402,679.58/x - Step 3: Cross multiply
644,288.41x = 889,562.81 × 402,679.58 - Step 4: Simplify right side
644,288.41x = 358,208,776,701.02 - Step 5: Solve for x
x = 358,208,776,701.02/644,288.41 - Step 6: Final answer
x = 555,975.82
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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.