Finding the Fourth Proportional to 1,390,354.02, 1,918,673.73 and 778,512.42
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Solution
The fourth proportional to 1,390,354.02, 1,918,673.73 and 778,512.42 is: 1,074,338.84
Step by Step Solution
- Step 1: Write the proportion equation
1,390,354.02 : 1,918,673.73 = 778,512.42 : x - Step 2: Convert to fraction form
1,390,354.02/1,918,673.73 = 778,512.42/x - Step 3: Cross multiply
1,390,354.02x = 1,918,673.73 × 778,512.42 - Step 4: Simplify right side
1,390,354.02x = 1,493,711,328,732.73 - Step 5: Solve for x
x = 1,493,711,328,732.73/1,390,354.02 - Step 6: Final answer
x = 1,074,338.84
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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.