Finding the Fourth Proportional to 644,320.40, 889,164.21 and 357,840.47
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Solution
The fourth proportional to 644,320.40, 889,164.21 and 357,840.47 is: 493,820.99
Step by Step Solution
- Step 1: Write the proportion equation
644,320.40 : 889,164.21 = 357,840.47 : x - Step 2: Convert to fraction form
644,320.40/889,164.21 = 357,840.47/x - Step 3: Cross multiply
644,320.40x = 889,164.21 × 357,840.47 - Step 4: Simplify right side
644,320.40x = 318,178,938,813.58 - Step 5: Solve for x
x = 318,178,938,813.58/644,320.40 - Step 6: Final answer
x = 493,820.99
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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.