Finding the Fourth Proportional to 1,259,717,643.80, 1,889,576,465.70 and 647,497,611.80
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Solution
The fourth proportional to 1,259,717,643.80, 1,889,576,465.70 and 647,497,611.80 is: 971,246,417.70
Step by Step Solution
- Step 1: Write the proportion equation
1,259,717,643.80 : 1,889,576,465.70 = 647,497,611.80 : x - Step 2: Convert to fraction form
1,259,717,643.80/1,889,576,465.70 = 647,497,611.80/x - Step 3: Cross multiply
1,259,717,643.80x = 1,889,576,465.70 × 647,497,611.80 - Step 4: Simplify right side
1,259,717,643.80x = 1,223,496,248,854,234,624 - Step 5: Solve for x
x = 1,223,496,248,854,234,624/1,259,717,643.80 - Step 6: Final answer
x = 971,246,417.70
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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.