Finding the Fourth Proportional to 1,213,985.70, 1,696,430.70 and 1,213,985.70
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Solution
The fourth proportional to 1,213,985.70, 1,696,430.70 and 1,213,985.70 is: 1,696,430.70
Step by Step Solution
- Step 1: Write the proportion equation
1,213,985.70 : 1,696,430.70 = 1,213,985.70 : x - Step 2: Convert to fraction form
1,213,985.70/1,696,430.70 = 1,213,985.70/x - Step 3: Cross multiply
1,213,985.70x = 1,696,430.70 × 1,213,985.70 - Step 4: Simplify right side
1,213,985.70x = 2,059,442,610,840.99 - Step 5: Solve for x
x = 2,059,442,610,840.99/1,213,985.70 - Step 6: Final answer
x = 1,696,430.70
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.