Finding the Fourth Proportional to 390,925,134.68, 539,228,782.14 and 240,151,812.44
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Solution
The fourth proportional to 390,925,134.68, 539,228,782.14 and 240,151,812.44 is: 331,257,209.79
Step by Step Solution
- Step 1: Write the proportion equation
390,925,134.68 : 539,228,782.14 = 240,151,812.44 : x - Step 2: Convert to fraction form
390,925,134.68/539,228,782.14 = 240,151,812.44/x - Step 3: Cross multiply
390,925,134.68x = 539,228,782.14 × 240,151,812.44 - Step 4: Simplify right side
390,925,134.68x = 129,496,769,350,734,896 - Step 5: Solve for x
x = 129,496,769,350,734,896/390,925,134.68 - Step 6: Final answer
x = 331,257,209.79
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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.