Finding the Fourth Proportional to 390,438,347.36, 538,805,942.50 and 211,822,226.41
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Solution
The fourth proportional to 390,438,347.36, 538,805,942.50 and 211,822,226.41 is: 292,315,227.53
Step by Step Solution
- Step 1: Write the proportion equation
390,438,347.36 : 538,805,942.50 = 211,822,226.41 : x - Step 2: Convert to fraction form
390,438,347.36/538,805,942.50 = 211,822,226.41/x - Step 3: Cross multiply
390,438,347.36x = 538,805,942.50 × 211,822,226.41 - Step 4: Simplify right side
390,438,347.36x = 114,131,074,343,288,432 - Step 5: Solve for x
x = 114,131,074,343,288,432/390,438,347.36 - Step 6: Final answer
x = 292,315,227.53
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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.