Finding the Fourth Proportional to 1,390,176.32, 1,918,447.68 and 778,354.88
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Solution
The fourth proportional to 1,390,176.32, 1,918,447.68 and 778,354.88 is: 1,074,132.17
Step by Step Solution
- Step 1: Write the proportion equation
1,390,176.32 : 1,918,447.68 = 778,354.88 : x - Step 2: Convert to fraction form
1,390,176.32/1,918,447.68 = 778,354.88/x - Step 3: Cross multiply
1,390,176.32x = 1,918,447.68 × 778,354.88 - Step 4: Simplify right side
1,390,176.32x = 1,493,233,113,752.68 - Step 5: Solve for x
x = 1,493,233,113,752.68/1,390,176.32 - Step 6: Final answer
x = 1,074,132.17
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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.