Finding the Fourth Proportional to 836,793,742.70, 1,154,740,688.34 and 455,317,352.75
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Solution
The fourth proportional to 836,793,742.70, 1,154,740,688.34 and 455,317,352.75 is: 628,319,078.52
Step by Step Solution
- Step 1: Write the proportion equation
836,793,742.70 : 1,154,740,688.34 = 455,317,352.75 : x - Step 2: Convert to fraction form
836,793,742.70/1,154,740,688.34 = 455,317,352.75/x - Step 3: Cross multiply
836,793,742.70x = 1,154,740,688.34 × 455,317,352.75 - Step 4: Simplify right side
836,793,742.70x = 525,773,473,327,681,536 - Step 5: Solve for x
x = 525,773,473,327,681,536/836,793,742.70 - Step 6: Final answer
x = 628,319,078.52
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.