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Finding the Fourth Proportional to 483,842.40, 678,079.20 and 483,842.40

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Solution

The fourth proportional to 483,842.40, 678,079.20 and 483,842.40 is: 678,079.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,842.40 : 678,079.20 = 483,842.40 : x
  2. Step 2: Convert to fraction form
    483,842.40/678,079.20 = 483,842.40/x
  3. Step 3: Cross multiply
    483,842.40x = 678,079.20 × 483,842.40
  4. Step 4: Simplify right side
    483,842.40x = 328,083,467,518.08
  5. Step 5: Solve for x
    x = 328,083,467,518.08/483,842.40
  6. Step 6: Final answer
    x = 678,079.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.