Finding the Fourth Proportional to 644,715.77, 889,690.14 and 358,228.49
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Solution
The fourth proportional to 644,715.77, 889,690.14 and 358,228.49 is: 494,345.52
Step by Step Solution
- Step 1: Write the proportion equation
644,715.77 : 889,690.14 = 358,228.49 : x - Step 2: Convert to fraction form
644,715.77/889,690.14 = 358,228.49/x - Step 3: Cross multiply
644,715.77x = 889,690.14 × 358,228.49 - Step 4: Simplify right side
644,715.77x = 318,712,350,971.64 - Step 5: Solve for x
x = 318,712,350,971.64/644,715.77 - Step 6: Final answer
x = 494,345.52
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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.