Finding the Fourth Proportional to 390,195,808.08, 538,420,724.64 and 213,937,421.84
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Solution
The fourth proportional to 390,195,808.08, 538,420,724.64 and 213,937,421.84 is: 295,206,507.37
Step by Step Solution
- Step 1: Write the proportion equation
390,195,808.08 : 538,420,724.64 = 213,937,421.84 : x - Step 2: Convert to fraction form
390,195,808.08/538,420,724.64 = 213,937,421.84/x - Step 3: Cross multiply
390,195,808.08x = 538,420,724.64 × 213,937,421.84 - Step 4: Simplify right side
390,195,808.08x = 115,188,341,694,706,160 - Step 5: Solve for x
x = 115,188,341,694,706,160/390,195,808.08 - Step 6: Final answer
x = 295,206,507.37
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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.