Finding the Fourth Proportional to 351,803,878.11, 485,287,646.06 and 219,415,031.70
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Solution
The fourth proportional to 351,803,878.11, 485,287,646.06 and 219,415,031.70 is: 302,666,942.77
Step by Step Solution
- Step 1: Write the proportion equation
351,803,878.11 : 485,287,646.06 = 219,415,031.70 : x - Step 2: Convert to fraction form
351,803,878.11/485,287,646.06 = 219,415,031.70/x - Step 3: Cross multiply
351,803,878.11x = 485,287,646.06 × 219,415,031.70 - Step 4: Simplify right side
351,803,878.11x = 106,479,404,243,873,280 - Step 5: Solve for x
x = 106,479,404,243,873,280/351,803,878.11 - Step 6: Final answer
x = 302,666,942.77
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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.