Finding the Fourth Proportional to 390,814,910.26, 539,333,947.12 and 212,206,325.99
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Solution
The fourth proportional to 390,814,910.26, 539,333,947.12 and 212,206,325.99 is: 292,849,818.15
Step by Step Solution
- Step 1: Write the proportion equation
390,814,910.26 : 539,333,947.12 = 212,206,325.99 : x - Step 2: Convert to fraction form
390,814,910.26/539,333,947.12 = 212,206,325.99/x - Step 3: Cross multiply
390,814,910.26x = 539,333,947.12 × 212,206,325.99 - Step 4: Simplify right side
390,814,910.26x = 114,450,075,400,020,144 - Step 5: Solve for x
x = 114,450,075,400,020,144/390,814,910.26 - Step 6: Final answer
x = 292,849,818.15
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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.