Finding the Fourth Proportional to 879,985,497.70, 1,319,978,246.55 and 471,838,809.70
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Solution
The fourth proportional to 879,985,497.70, 1,319,978,246.55 and 471,838,809.70 is: 707,758,214.55
Step by Step Solution
- Step 1: Write the proportion equation
879,985,497.70 : 1,319,978,246.55 = 471,838,809.70 : x - Step 2: Convert to fraction form
879,985,497.70/1,319,978,246.55 = 471,838,809.70/x - Step 3: Cross multiply
879,985,497.70x = 1,319,978,246.55 × 471,838,809.70 - Step 4: Simplify right side
879,985,497.70x = 622,816,964,682,045,056 - Step 5: Solve for x
x = 622,816,964,682,045,056/879,985,497.70 - Step 6: Final answer
x = 707,758,214.55
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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.