Finding the Fourth Proportional to 390,734,707.24, 539,229,059.79 and 214,530,129.28
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Solution
The fourth proportional to 390,734,707.24, 539,229,059.79 and 214,530,129.28 is: 296,059,903.98
Step by Step Solution
- Step 1: Write the proportion equation
390,734,707.24 : 539,229,059.79 = 214,530,129.28 : x - Step 2: Convert to fraction form
390,734,707.24/539,229,059.79 = 214,530,129.28/x - Step 3: Cross multiply
390,734,707.24x = 539,229,059.79 × 214,530,129.28 - Step 4: Simplify right side
390,734,707.24x = 115,680,879,905,585,392 - Step 5: Solve for x
x = 115,680,879,905,585,392/390,734,707.24 - Step 6: Final answer
x = 296,059,903.98
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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.