Finding the Fourth Proportional to 782,330,686.80, 1,173,496,030.20 and 472,394,295.60
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Solution
The fourth proportional to 782,330,686.80, 1,173,496,030.20 and 472,394,295.60 is: 708,591,443.40
Step by Step Solution
- Step 1: Write the proportion equation
782,330,686.80 : 1,173,496,030.20 = 472,394,295.60 : x - Step 2: Convert to fraction form
782,330,686.80/1,173,496,030.20 = 472,394,295.60/x - Step 3: Cross multiply
782,330,686.80x = 1,173,496,030.20 × 472,394,295.60 - Step 4: Simplify right side
782,330,686.80x = 554,352,830,575,725,376 - Step 5: Solve for x
x = 554,352,830,575,725,376/782,330,686.80 - Step 6: Final answer
x = 708,591,443.40
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.