Finding the Fourth Proportional to 721,887,430.52, 996,205,916.94 and 391,862,793.08
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Solution
The fourth proportional to 721,887,430.52, 996,205,916.94 and 391,862,793.08 is: 540,771,339.95
Step by Step Solution
- Step 1: Write the proportion equation
721,887,430.52 : 996,205,916.94 = 391,862,793.08 : x - Step 2: Convert to fraction form
721,887,430.52/996,205,916.94 = 391,862,793.08/x - Step 3: Cross multiply
721,887,430.52x = 996,205,916.94 × 391,862,793.08 - Step 4: Simplify right side
721,887,430.52x = 390,376,033,094,930,880 - Step 5: Solve for x
x = 390,376,033,094,930,880/721,887,430.52 - Step 6: Final answer
x = 540,771,339.95
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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.