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Finding the Fourth Proportional to 425,477.60, 638,216.40 and 236,520.80

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Solution

The fourth proportional to 425,477.60, 638,216.40 and 236,520.80 is: 354,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,477.60 : 638,216.40 = 236,520.80 : x
  2. Step 2: Convert to fraction form
    425,477.60/638,216.40 = 236,520.80/x
  3. Step 3: Cross multiply
    425,477.60x = 638,216.40 × 236,520.80
  4. Step 4: Simplify right side
    425,477.60x = 150,951,453,501.12
  5. Step 5: Solve for x
    x = 150,951,453,501.12/425,477.60
  6. Step 6: Final answer
    x = 354,781.20

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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.