Finding the Fourth Proportional to 1,398,679,565.99, 1,930,127,200.35 and 772,134,540.62
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Solution
The fourth proportional to 1,398,679,565.99, 1,930,127,200.35 and 772,134,540.62 is: 1,065,517,732.17
Step by Step Solution
- Step 1: Write the proportion equation
1,398,679,565.99 : 1,930,127,200.35 = 772,134,540.62 : x - Step 2: Convert to fraction form
1,398,679,565.99/1,930,127,200.35 = 772,134,540.62/x - Step 3: Cross multiply
1,398,679,565.99x = 1,930,127,200.35 × 772,134,540.62 - Step 4: Simplify right side
1,398,679,565.99x = 1,490,317,879,180,413,952 - Step 5: Solve for x
x = 1,490,317,879,180,413,952/1,398,679,565.99 - Step 6: Final answer
x = 1,065,517,732.17
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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.