Finding the Fourth Proportional to 387,864,971.16, 535,265,017.74 and 211,664,320.62
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Solution
The fourth proportional to 387,864,971.16, 535,265,017.74 and 211,664,320.62 is: 292,102,960.45
Step by Step Solution
- Step 1: Write the proportion equation
387,864,971.16 : 535,265,017.74 = 211,664,320.62 : x - Step 2: Convert to fraction form
387,864,971.16/535,265,017.74 = 211,664,320.62/x - Step 3: Cross multiply
387,864,971.16x = 535,265,017.74 × 211,664,320.62 - Step 4: Simplify right side
387,864,971.16x = 113,296,506,331,589,360 - Step 5: Solve for x
x = 113,296,506,331,589,360/387,864,971.16 - Step 6: Final answer
x = 292,102,960.45
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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.