Finding the Fourth Proportional to 278,617,689.40, 417,926,534.10 and 74,166,431.80
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Solution
The fourth proportional to 278,617,689.40, 417,926,534.10 and 74,166,431.80 is: 111,249,647.70
Step by Step Solution
- Step 1: Write the proportion equation
278,617,689.40 : 417,926,534.10 = 74,166,431.80 : x - Step 2: Convert to fraction form
278,617,689.40/417,926,534.10 = 74,166,431.80/x - Step 3: Cross multiply
278,617,689.40x = 417,926,534.10 × 74,166,431.80 - Step 4: Simplify right side
278,617,689.40x = 30,996,119,788,738,024 - Step 5: Solve for x
x = 30,996,119,788,738,024/278,617,689.40 - Step 6: Final answer
x = 111,249,647.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.