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Finding the Fourth Proportional to 401,838.60, 603,218.70 and 235,720.20

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Solution

The fourth proportional to 401,838.60, 603,218.70 and 235,720.20 is: 353,850.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,838.60 : 603,218.70 = 235,720.20 : x
  2. Step 2: Convert to fraction form
    401,838.60/603,218.70 = 235,720.20/x
  3. Step 3: Cross multiply
    401,838.60x = 603,218.70 × 235,720.20
  4. Step 4: Simplify right side
    401,838.60x = 142,190,832,607.74
  5. Step 5: Solve for x
    x = 142,190,832,607.74/401,838.60
  6. Step 6: Final answer
    x = 353,850.61

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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.