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Finding the Fourth Proportional to 638,820.30, 958,230.45 and 470,858.70

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Solution

The fourth proportional to 638,820.30, 958,230.45 and 470,858.70 is: 706,288.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,820.30 : 958,230.45 = 470,858.70 : x
  2. Step 2: Convert to fraction form
    638,820.30/958,230.45 = 470,858.70/x
  3. Step 3: Cross multiply
    638,820.30x = 958,230.45 × 470,858.70
  4. Step 4: Simplify right side
    638,820.30x = 451,191,143,987.42
  5. Step 5: Solve for x
    x = 451,191,143,987.42/638,820.30
  6. Step 6: Final answer
    x = 706,288.05

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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.