Finding the Fourth Proportional to 1,391,307.99, 1,919,569.23 and 779,378.10
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Solution
The fourth proportional to 1,391,307.99, 1,919,569.23 and 779,378.10 is: 1,075,297.66
Step by Step Solution
- Step 1: Write the proportion equation
1,391,307.99 : 1,919,569.23 = 779,378.10 : x - Step 2: Convert to fraction form
1,391,307.99/1,919,569.23 = 779,378.10/x - Step 3: Cross multiply
1,391,307.99x = 1,919,569.23 × 779,378.10 - Step 4: Simplify right side
1,391,307.99x = 1,496,070,219,295.86 - Step 5: Solve for x
x = 1,496,070,219,295.86/1,391,307.99 - Step 6: Final answer
x = 1,075,297.66
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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.