Finding the Fourth Proportional to 790,806,508.21, 1,091,312,963.99 and 438,381,605.89
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Solution
The fourth proportional to 790,806,508.21, 1,091,312,963.99 and 438,381,605.89 is: 604,966,606.52
Step by Step Solution
- Step 1: Write the proportion equation
790,806,508.21 : 1,091,312,963.99 = 438,381,605.89 : x - Step 2: Convert to fraction form
790,806,508.21/1,091,312,963.99 = 438,381,605.89/x - Step 3: Cross multiply
790,806,508.21x = 1,091,312,963.99 × 438,381,605.89 - Step 4: Simplify right side
790,806,508.21x = 478,411,529,682,511,936 - Step 5: Solve for x
x = 478,411,529,682,511,936/790,806,508.21 - Step 6: Final answer
x = 604,966,606.52
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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.