Finding the Fourth Proportional to 1,438,781,302.80, 1,985,306,867.76 and 803,623,539.12
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Solution
The fourth proportional to 1,438,781,302.80, 1,985,306,867.76 and 803,623,539.12 is: 1,108,882,446.70
Step by Step Solution
- Step 1: Write the proportion equation
1,438,781,302.80 : 1,985,306,867.76 = 803,623,539.12 : x - Step 2: Convert to fraction form
1,438,781,302.80/1,985,306,867.76 = 803,623,539.12/x - Step 3: Cross multiply
1,438,781,302.80x = 1,985,306,867.76 × 803,623,539.12 - Step 4: Simplify right side
1,438,781,302.80x = 1,595,439,331,308,532,992 - Step 5: Solve for x
x = 1,595,439,331,308,532,992/1,438,781,302.80 - Step 6: Final answer
x = 1,108,882,446.70
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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.