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Finding the Fourth Proportional to 403,422.81, 605,132.37 and 192,421.05

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Solution

The fourth proportional to 403,422.81, 605,132.37 and 192,421.05 is: 288,630.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,422.81 : 605,132.37 = 192,421.05 : x
  2. Step 2: Convert to fraction form
    403,422.81/605,132.37 = 192,421.05/x
  3. Step 3: Cross multiply
    403,422.81x = 605,132.37 × 192,421.05
  4. Step 4: Simplify right side
    403,422.81x = 116,440,206,024.39
  5. Step 5: Solve for x
    x = 116,440,206,024.39/403,422.81
  6. Step 6: Final answer
    x = 288,630.69

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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.