Finding the Fourth Proportional to 708,588,712.80, 1,062,883,069.20 and 639,713,959.20
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Solution
The fourth proportional to 708,588,712.80, 1,062,883,069.20 and 639,713,959.20 is: 959,570,938.80
Step by Step Solution
- Step 1: Write the proportion equation
708,588,712.80 : 1,062,883,069.20 = 639,713,959.20 : x - Step 2: Convert to fraction form
708,588,712.80/1,062,883,069.20 = 639,713,959.20/x - Step 3: Cross multiply
708,588,712.80x = 1,062,883,069.20 × 639,713,959.20 - Step 4: Simplify right side
708,588,712.80x = 679,941,136,364,579,712 - Step 5: Solve for x
x = 679,941,136,364,579,712/708,588,712.80 - Step 6: Final answer
x = 959,570,938.80
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Double scale
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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.