Finding the Fourth Proportional to 390,482,873.87, 538,864,887.71 and 214,273,818.05
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Solution
The fourth proportional to 390,482,873.87, 538,864,887.71 and 214,273,818.05 is: 295,697,057.74
Step by Step Solution
- Step 1: Write the proportion equation
390,482,873.87 : 538,864,887.71 = 214,273,818.05 : x - Step 2: Convert to fraction form
390,482,873.87/538,864,887.71 = 214,273,818.05/x - Step 3: Cross multiply
390,482,873.87x = 538,864,887.71 × 214,273,818.05 - Step 4: Simplify right side
390,482,873.87x = 115,464,636,901,634,864 - Step 5: Solve for x
x = 115,464,636,901,634,864/390,482,873.87 - Step 6: Final answer
x = 295,697,057.74
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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.