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Finding the Fourth Proportional to 425,523.20, 638,430.60 and 189,035.60

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Solution

The fourth proportional to 425,523.20, 638,430.60 and 189,035.60 is: 283,618.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,523.20 : 638,430.60 = 189,035.60 : x
  2. Step 2: Convert to fraction form
    425,523.20/638,430.60 = 189,035.60/x
  3. Step 3: Cross multiply
    425,523.20x = 638,430.60 × 189,035.60
  4. Step 4: Simplify right side
    425,523.20x = 120,686,111,529.36
  5. Step 5: Solve for x
    x = 120,686,111,529.36/425,523.20
  6. Step 6: Final answer
    x = 283,618.17

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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.