Finding the Fourth Proportional to 390,482,874.62, 538,864,888.74 and 214,273,818.80
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Solution
The fourth proportional to 390,482,874.62, 538,864,888.74 and 214,273,818.80 is: 295,697,058.78
Step by Step Solution
- Step 1: Write the proportion equation
390,482,874.62 : 538,864,888.74 = 214,273,818.80 : x - Step 2: Convert to fraction form
390,482,874.62/538,864,888.74 = 214,273,818.80/x - Step 3: Cross multiply
390,482,874.62x = 538,864,888.74 × 214,273,818.80 - Step 4: Simplify right side
390,482,874.62x = 115,464,637,527,556,928 - Step 5: Solve for x
x = 115,464,637,527,556,928/390,482,874.62 - Step 6: Final answer
x = 295,697,058.78
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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.