Finding the Fourth Proportional to 1,128,590,956.67, 1,557,474,774.99 and 619,975,116.77
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Solution
The fourth proportional to 1,128,590,956.67, 1,557,474,774.99 and 619,975,116.77 is: 855,576,238.48
Step by Step Solution
- Step 1: Write the proportion equation
1,128,590,956.67 : 1,557,474,774.99 = 619,975,116.77 : x - Step 2: Convert to fraction form
1,128,590,956.67/1,557,474,774.99 = 619,975,116.77/x - Step 3: Cross multiply
1,128,590,956.67x = 1,557,474,774.99 × 619,975,116.77 - Step 4: Simplify right side
1,128,590,956.67x = 965,595,605,490,754,688 - Step 5: Solve for x
x = 965,595,605,490,754,688/1,128,590,956.67 - Step 6: Final answer
x = 855,576,238.48
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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.