Finding the Fourth Proportional to 1,315,197,129.48, 1,814,957,574.36 and 712,352,754.70
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Solution
The fourth proportional to 1,315,197,129.48, 1,814,957,574.36 and 712,352,754.70 is: 983,038,967.15
Step by Step Solution
- Step 1: Write the proportion equation
1,315,197,129.48 : 1,814,957,574.36 = 712,352,754.70 : x - Step 2: Convert to fraction form
1,315,197,129.48/1,814,957,574.36 = 712,352,754.70/x - Step 3: Cross multiply
1,315,197,129.48x = 1,814,957,574.36 × 712,352,754.70 - Step 4: Simplify right side
1,315,197,129.48x = 1,292,890,027,758,976,000 - Step 5: Solve for x
x = 1,292,890,027,758,976,000/1,315,197,129.48 - Step 6: Final answer
x = 983,038,967.15
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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.