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Finding the Fourth Proportional to 338,391.53, 507,835.38 and 272,625.71

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Solution

The fourth proportional to 338,391.53, 507,835.38 and 272,625.71 is: 409,138.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,391.53 : 507,835.38 = 272,625.71 : x
  2. Step 2: Convert to fraction form
    338,391.53/507,835.38 = 272,625.71/x
  3. Step 3: Cross multiply
    338,391.53x = 507,835.38 × 272,625.71
  4. Step 4: Simplify right side
    338,391.53x = 138,448,979,518.79
  5. Step 5: Solve for x
    x = 138,448,979,518.79/338,391.53
  6. Step 6: Final answer
    x = 409,138.43

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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.