Finding the Fourth Proportional to 780,283,251.87, 1,075,749,235.11 and 619,879,447.71
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Solution
The fourth proportional to 780,283,251.87, 1,075,749,235.11 and 619,879,447.71 is: 854,606,119.17
Step by Step Solution
- Step 1: Write the proportion equation
780,283,251.87 : 1,075,749,235.11 = 619,879,447.71 : x - Step 2: Convert to fraction form
780,283,251.87/1,075,749,235.11 = 619,879,447.71/x - Step 3: Cross multiply
780,283,251.87x = 1,075,749,235.11 × 619,879,447.71 - Step 4: Simplify right side
780,283,251.87x = 666,834,841,734,441,728 - Step 5: Solve for x
x = 666,834,841,734,441,728/780,283,251.87 - Step 6: Final answer
x = 854,606,119.17
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Double scale
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1.5x scale
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.