Finding the Fourth Proportional to 1,399,682,434.90, 2,099,523,652.35 and 430,208,079.70
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Solution
The fourth proportional to 1,399,682,434.90, 2,099,523,652.35 and 430,208,079.70 is: 645,312,119.55
Step by Step Solution
- Step 1: Write the proportion equation
1,399,682,434.90 : 2,099,523,652.35 = 430,208,079.70 : x - Step 2: Convert to fraction form
1,399,682,434.90/2,099,523,652.35 = 430,208,079.70/x - Step 3: Cross multiply
1,399,682,434.90x = 2,099,523,652.35 × 430,208,079.70 - Step 4: Simplify right side
1,399,682,434.90x = 903,232,038,762,223,872 - Step 5: Solve for x
x = 903,232,038,762,223,872/1,399,682,434.90 - Step 6: Final answer
x = 645,312,119.55
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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.