Finding the Fourth Proportional to 390,357.08, 538,692.90 and 211,509.08
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Solution
The fourth proportional to 390,357.08, 538,692.90 and 211,509.08 is: 291,882.60
Step by Step Solution
- Step 1: Write the proportion equation
390,357.08 : 538,692.90 = 211,509.08 : x - Step 2: Convert to fraction form
390,357.08/538,692.90 = 211,509.08/x - Step 3: Cross multiply
390,357.08x = 538,692.90 × 211,509.08 - Step 4: Simplify right side
390,357.08x = 113,938,439,681.53 - Step 5: Solve for x
x = 113,938,439,681.53/390,357.08 - Step 6: Final answer
x = 291,882.60
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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.