Finding the Fourth Proportional to 839,808,101.70, 1,259,712,152.55 and 768,382,431.30
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Solution
The fourth proportional to 839,808,101.70, 1,259,712,152.55 and 768,382,431.30 is: 1,152,573,646.95
Step by Step Solution
- Step 1: Write the proportion equation
839,808,101.70 : 1,259,712,152.55 = 768,382,431.30 : x - Step 2: Convert to fraction form
839,808,101.70/1,259,712,152.55 = 768,382,431.30/x - Step 3: Cross multiply
839,808,101.70x = 1,259,712,152.55 × 768,382,431.30 - Step 4: Simplify right side
839,808,101.70x = 967,940,686,514,525,440 - Step 5: Solve for x
x = 967,940,686,514,525,440/839,808,101.70 - Step 6: Final answer
x = 1,152,573,646.95
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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.