Finding the Fourth Proportional to 1,438,593,369.48, 1,985,258,825.73 and 778,543,647.48
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Solution
The fourth proportional to 1,438,593,369.48, 1,985,258,825.73 and 778,543,647.48 is: 1,074,390,220.45
Step by Step Solution
- Step 1: Write the proportion equation
1,438,593,369.48 : 1,985,258,825.73 = 778,543,647.48 : x - Step 2: Convert to fraction form
1,438,593,369.48/1,985,258,825.73 = 778,543,647.48/x - Step 3: Cross multiply
1,438,593,369.48x = 1,985,258,825.73 × 778,543,647.48 - Step 4: Simplify right side
1,438,593,369.48x = 1,545,610,647,375,695,872 - Step 5: Solve for x
x = 1,545,610,647,375,695,872/1,438,593,369.48 - Step 6: Final answer
x = 1,074,390,220.45
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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.