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Finding the Fourth Proportional to 338,568.14, 507,704.56 and 128,058.45

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Solution

The fourth proportional to 338,568.14, 507,704.56 and 128,058.45 is: 192,031.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,568.14 : 507,704.56 = 128,058.45 : x
  2. Step 2: Convert to fraction form
    338,568.14/507,704.56 = 128,058.45/x
  3. Step 3: Cross multiply
    338,568.14x = 507,704.56 × 128,058.45
  4. Step 4: Simplify right side
    338,568.14x = 65,015,860,280.79
  5. Step 5: Solve for x
    x = 65,015,860,280.79/338,568.14
  6. Step 6: Final answer
    x = 192,031.83

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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.