Finding the Fourth Proportional to 1,278,749,533.68, 1,764,674,334.90 and 692,038,669.68
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Solution
The fourth proportional to 1,278,749,533.68, 1,764,674,334.90 and 692,038,669.68 is: 955,013,352.48
Step by Step Solution
- Step 1: Write the proportion equation
1,278,749,533.68 : 1,764,674,334.90 = 692,038,669.68 : x - Step 2: Convert to fraction form
1,278,749,533.68/1,764,674,334.90 = 692,038,669.68/x - Step 3: Cross multiply
1,278,749,533.68x = 1,764,674,334.90 × 692,038,669.68 - Step 4: Simplify right side
1,278,749,533.68x = 1,221,222,879,142,634,752 - Step 5: Solve for x
x = 1,221,222,879,142,634,752/1,278,749,533.68 - Step 6: Final answer
x = 955,013,352.48
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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.