Finding the Fourth Proportional to 644,275.68, 889,070.76 and 357,813.96
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Solution
The fourth proportional to 644,275.68, 889,070.76 and 357,813.96 is: 493,766.78
Step by Step Solution
- Step 1: Write the proportion equation
644,275.68 : 889,070.76 = 357,813.96 : x - Step 2: Convert to fraction form
644,275.68/889,070.76 = 357,813.96/x - Step 3: Cross multiply
644,275.68x = 889,070.76 × 357,813.96 - Step 4: Simplify right side
644,275.68x = 318,121,929,355.81 - Step 5: Solve for x
x = 318,121,929,355.81/644,275.68 - Step 6: Final answer
x = 493,766.78
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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.