Finding the Fourth Proportional to 390,482,964.70, 538,865,012.56 and 214,273,908.26
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Solution
The fourth proportional to 390,482,964.70, 538,865,012.56 and 214,273,908.26 is: 295,697,181.96
Step by Step Solution
- Step 1: Write the proportion equation
390,482,964.70 : 538,865,012.56 = 214,273,908.26 : x - Step 2: Convert to fraction form
390,482,964.70/538,865,012.56 = 214,273,908.26/x - Step 3: Cross multiply
390,482,964.70x = 538,865,012.56 × 214,273,908.26 - Step 4: Simplify right side
390,482,964.70x = 115,464,712,265,805,168 - Step 5: Solve for x
x = 115,464,712,265,805,168/390,482,964.70 - Step 6: Final answer
x = 295,697,181.96
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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.