Finding the Fourth Proportional to 390,677,368.81, 539,114,970.05 and 231,914,278.05
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Solution
The fourth proportional to 390,677,368.81, 539,114,970.05 and 231,914,278.05 is: 320,029,950.66
Step by Step Solution
- Step 1: Write the proportion equation
390,677,368.81 : 539,114,970.05 = 231,914,278.05 : x - Step 2: Convert to fraction form
390,677,368.81/539,114,970.05 = 231,914,278.05/x - Step 3: Cross multiply
390,677,368.81x = 539,114,970.05 × 231,914,278.05 - Step 4: Simplify right side
390,677,368.81x = 125,028,459,065,160,448 - Step 5: Solve for x
x = 125,028,459,065,160,448/390,677,368.81 - Step 6: Final answer
x = 320,029,950.66
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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.