Finding the Fourth Proportional to 692,543.80, 1,038,815.70 and 319,295.80
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Solution
The fourth proportional to 692,543.80, 1,038,815.70 and 319,295.80 is: 478,943.70
Step by Step Solution
- Step 1: Write the proportion equation
692,543.80 : 1,038,815.70 = 319,295.80 : x - Step 2: Convert to fraction form
692,543.80/1,038,815.70 = 319,295.80/x - Step 3: Cross multiply
692,543.80x = 1,038,815.70 × 319,295.80 - Step 4: Simplify right side
692,543.80x = 331,689,489,984.06 - Step 5: Solve for x
x = 331,689,489,984.06/692,543.80 - Step 6: Final answer
x = 478,943.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.