Finding the Fourth Proportional to 1,138,708,428.80, 1,708,062,643.20 and 679,165,491.20
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Solution
The fourth proportional to 1,138,708,428.80, 1,708,062,643.20 and 679,165,491.20 is: 1,018,748,236.80
Step by Step Solution
- Step 1: Write the proportion equation
1,138,708,428.80 : 1,708,062,643.20 = 679,165,491.20 : x - Step 2: Convert to fraction form
1,138,708,428.80/1,708,062,643.20 = 679,165,491.20/x - Step 3: Cross multiply
1,138,708,428.80x = 1,708,062,643.20 × 679,165,491.20 - Step 4: Simplify right side
1,138,708,428.80x = 1,160,057,204,069,298,432 - Step 5: Solve for x
x = 1,160,057,204,069,298,432/1,138,708,428.80 - Step 6: Final answer
x = 1,018,748,236.80
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.