Finding the Fourth Proportional to 686,643.70, 1,029,965.55 and 651,651.70
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Solution
The fourth proportional to 686,643.70, 1,029,965.55 and 651,651.70 is: 977,477.55
Step by Step Solution
- Step 1: Write the proportion equation
686,643.70 : 1,029,965.55 = 651,651.70 : x - Step 2: Convert to fraction form
686,643.70/1,029,965.55 = 651,651.70/x - Step 3: Cross multiply
686,643.70x = 1,029,965.55 × 651,651.70 - Step 4: Simplify right side
686,643.70x = 671,178,801,598.94 - Step 5: Solve for x
x = 671,178,801,598.94/686,643.70 - Step 6: Final answer
x = 977,477.55
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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.