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Finding the Fourth Proportional to 638,887.80, 958,331.70 and 470,926.20

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Solution

The fourth proportional to 638,887.80, 958,331.70 and 470,926.20 is: 706,389.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,887.80 : 958,331.70 = 470,926.20 : x
  2. Step 2: Convert to fraction form
    638,887.80/958,331.70 = 470,926.20/x
  3. Step 3: Cross multiply
    638,887.80x = 958,331.70 × 470,926.20
  4. Step 4: Simplify right side
    638,887.80x = 451,303,505,820.54
  5. Step 5: Solve for x
    x = 451,303,505,820.54/638,887.80
  6. Step 6: Final answer
    x = 706,389.30

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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.