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Finding the Fourth Proportional to 290,718.72, 436,082.40 and 191,514.24

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Solution

The fourth proportional to 290,718.72, 436,082.40 and 191,514.24 is: 287,274.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,718.72 : 436,082.40 = 191,514.24 : x
  2. Step 2: Convert to fraction form
    290,718.72/436,082.40 = 191,514.24/x
  3. Step 3: Cross multiply
    290,718.72x = 436,082.40 × 191,514.24
  4. Step 4: Simplify right side
    290,718.72x = 83,515,989,413.38
  5. Step 5: Solve for x
    x = 83,515,989,413.38/290,718.72
  6. Step 6: Final answer
    x = 287,274.21

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1.5x scale

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.