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Finding the Fourth Proportional to 393,082.08, 542,285.16 and 256,879.64

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Solution

The fourth proportional to 393,082.08, 542,285.16 and 256,879.64 is: 354,384.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,082.08 : 542,285.16 = 256,879.64 : x
  2. Step 2: Convert to fraction form
    393,082.08/542,285.16 = 256,879.64/x
  3. Step 3: Cross multiply
    393,082.08x = 542,285.16 × 256,879.64
  4. Step 4: Simplify right side
    393,082.08x = 139,302,016,678.14
  5. Step 5: Solve for x
    x = 139,302,016,678.14/393,082.08
  6. Step 6: Final answer
    x = 354,384.04

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1.5x scale

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.