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Finding the Fourth Proportional to 403,937.20, 605,905.80 and 235,647.55

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Solution

The fourth proportional to 403,937.20, 605,905.80 and 235,647.55 is: 353,471.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,937.20 : 605,905.80 = 235,647.55 : x
  2. Step 2: Convert to fraction form
    403,937.20/605,905.80 = 235,647.55/x
  3. Step 3: Cross multiply
    403,937.20x = 605,905.80 × 235,647.55
  4. Step 4: Simplify right side
    403,937.20x = 142,780,217,300.79
  5. Step 5: Solve for x
    x = 142,780,217,300.79/403,937.20
  6. Step 6: Final answer
    x = 353,471.33

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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.