Finding the Fourth Proportional to 390,788.95, 586,275.57 and 311,128.09
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Solution
The fourth proportional to 390,788.95, 586,275.57 and 311,128.09 is: 466,765.50
Step by Step Solution
- Step 1: Write the proportion equation
390,788.95 : 586,275.57 = 311,128.09 : x - Step 2: Convert to fraction form
390,788.95/586,275.57 = 311,128.09/x - Step 3: Cross multiply
390,788.95x = 586,275.57 × 311,128.09 - Step 4: Simplify right side
390,788.95x = 182,406,798,307.76 - Step 5: Solve for x
x = 182,406,798,307.76/390,788.95 - Step 6: Final answer
x = 466,765.50
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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.