Finding the Fourth Proportional to 1,390,811.08, 1,919,099.94 and 810,129.76
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Solution
The fourth proportional to 1,390,811.08, 1,919,099.94 and 810,129.76 is: 1,117,851.30
Step by Step Solution
- Step 1: Write the proportion equation
1,390,811.08 : 1,919,099.94 = 810,129.76 : x - Step 2: Convert to fraction form
1,390,811.08/1,919,099.94 = 810,129.76/x - Step 3: Cross multiply
1,390,811.08x = 1,919,099.94 × 810,129.76 - Step 4: Simplify right side
1,390,811.08x = 1,554,719,973,808.21 - Step 5: Solve for x
x = 1,554,719,973,808.21/1,390,811.08 - Step 6: Final answer
x = 1,117,851.30
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.