Finding the Fourth Proportional to 1,242,697,966.22, 1,714,959,551.09 and 678,219,053.02
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Solution
The fourth proportional to 1,242,697,966.22, 1,714,959,551.09 and 678,219,053.02 is: 935,962,135.87
Step by Step Solution
- Step 1: Write the proportion equation
1,242,697,966.22 : 1,714,959,551.09 = 678,219,053.02 : x - Step 2: Convert to fraction form
1,242,697,966.22/1,714,959,551.09 = 678,219,053.02/x - Step 3: Cross multiply
1,242,697,966.22x = 1,714,959,551.09 × 678,219,053.02 - Step 4: Simplify right side
1,242,697,966.22x = 1,163,118,242,707,864,064 - Step 5: Solve for x
x = 1,163,118,242,707,864,064/1,242,697,966.22 - Step 6: Final answer
x = 935,962,135.87
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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.