Finding the Fourth Proportional to 368,412,421.69, 508,453,723.63 and 209,681,137.95
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Solution
The fourth proportional to 368,412,421.69, 508,453,723.63 and 209,681,137.95 is: 289,385,343.95
Step by Step Solution
- Step 1: Write the proportion equation
368,412,421.69 : 508,453,723.63 = 209,681,137.95 : x - Step 2: Convert to fraction form
368,412,421.69/508,453,723.63 = 209,681,137.95/x - Step 3: Cross multiply
368,412,421.69x = 508,453,723.63 × 209,681,137.95 - Step 4: Simplify right side
368,412,421.69x = 106,613,155,365,653,200 - Step 5: Solve for x
x = 106,613,155,365,653,200/368,412,421.69 - Step 6: Final answer
x = 289,385,343.95
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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.